[eppp]: Fix uart driver deps with new IDF

[david-cermak]

Fixes the issue:

FAILED: esp-idf/espressif__eppp_link/CMakeFiles/__idf_espressif__eppp_link.dir/eppp_uart.c.obj
/home/david/.espressif/tools/riscv32-esp-elf/esp-15.1.0_20250607/riscv32-esp-elf/bin/riscv32-esp-elf-gcc -DESP_PLATFORM -DIDF_VER=\"v6.0-dev-2263-ge95945bc59\" -DSOC_MMU_PAGE_SIZE=CONFIG_MMU_PAGE_SIZE -DSOC_XTAL_FREQ_MHZ=CONFIG_XTAL_FREQ -D_GLIBCXX_HAVE_POSIX_SEMAPHORE -D_GLIBCXX_USE_POSIX_SEMAPHORE -D_GNU_SOURCE -D_POSIX_READER_WRITER_LOCKS -I/home/david/esp/idf/examples/wifi/iperf/build/config -I/home/david/esp/idf/examples/wifi/iperf/managed_components/espressif__eppp_link/include -I/home/david/esp/idf/components/esp_libc/platform_include -I/home/david/esp/idf/components/freertos/config/include -I/home/david/esp/idf/components/freertos/config/include/freertos -I/home/david/esp/idf/components/freertos/config/riscv/include -I/home/david/esp/idf/components/freertos/FreeRTOS-Kernel/include -I/home/david/esp/idf/components/freertos/FreeRTOS-Kernel/portable/riscv/include -I/home/david/esp/idf/components/freertos/FreeRTOS-Kernel/portable/riscv/include/freertos -I/home/david/esp/idf/components/freertos/esp_additions/include -I/home/david/esp/idf/components/esp_hw_support/include -I/home/david/esp/idf/components/esp_hw_support/include/soc -I/home/david/esp/idf/components/esp_hw_support/dma/include -I/home/david/esp/idf/components/esp_hw_support/ldo/include -I/home/david/esp/idf/components/esp_hw_support/debug_probe/include -I/home/david/esp/idf/components/esp_hw_support/etm/include -I/home/david/esp/idf/components/esp_hw_support/mspi_timing_tuning/include -I/home/david/esp/idf/components/esp_hw_support/mspi_timing_tuning/tuning_scheme_impl/include -I/home/david/esp/idf/components/esp_hw_support/power_supply/include -I/home/david/esp/idf/components/esp_hw_support/modem/include -I/home/david/esp/idf/components/esp_hw_support/port/esp32p4/. -I/home/david/esp/idf/components/esp_hw_support/port/esp32p4/include -I/home/david/esp/idf/components/esp_hw_support/port/esp32p4/private_include -I/home/david/esp/idf/components/esp_hw_support/mspi_timing_tuning/port/esp32p4/. -I/home/david/esp/idf/components/heap/include -I/home/david/esp/idf/components/heap/tlsf -I/home/david/esp/idf/components/log/include -I/home/david/esp/idf/components/soc/include -I/home/david/esp/idf/components/soc/esp32p4 -I/home/david/esp/idf/components/soc/esp32p4/include -I/home/david/esp/idf/components/soc/esp32p4/register/hw_ver1 -I/home/david/esp/idf/components/hal/platform_port/include -I/home/david/esp/idf/components/hal/esp32p4/include -I/home/david/esp/idf/components/hal/include -I/home/david/esp/idf/components/esp_rom/include -I/home/david/esp/idf/components/esp_rom/esp32p4/include -I/home/david/esp/idf/components/esp_rom/esp32p4/include/esp32p4 -I/home/david/esp/idf/components/esp_rom/esp32p4 -I/home/david/esp/idf/components/esp_common/include -I/home/david/esp/idf/components/esp_system/include -I/home/david/esp/idf/components/esp_system/port/soc -I/home/david/esp/idf/components/esp_system/port/include/riscv -I/home/david/esp/idf/components/esp_system/port/include/private -I/home/david/esp/idf/components/riscv/include -I/home/david/esp/idf/components/lwip/include -I/home/david/esp/idf/components/lwip/include/apps -I/home/david/esp/idf/components/lwip/include/apps/sntp -I/home/david/esp/idf/components/lwip/lwip/src/include -I/home/david/esp/idf/components/lwip/port/include -I/home/david/esp/idf/components/lwip/port/freertos/include -I/home/david/esp/idf/components/lwip/port/esp32xx/include -I/home/david/esp/idf/components/lwip/port/esp32xx/include/arch -I/home/david/esp/idf/components/lwip/port/esp32xx/include/sys -I/home/david/esp/idf/components/esp_netif/include -I/home/david/esp/idf/components/esp_event/include -I/home/david/esp/idf/components/esp_timer/include -I/home/david/esp/idf/components/esp_eth/include -I/home/david/esp/idf/components/esp_driver_spi/include -I/home/david/esp/idf/components/esp_pm/include -I/home/david/esp/idf/components/esp_driver_gpio/include -I/home/david/esp/idf/examples/wifi/iperf/managed_components/espressif__esp_serial_slave_link/include -I/home/david/esp/idf/components/sdmmc/include -I/home/david/esp/idf/components/esp_driver_sdmmc/include -I/home/david/esp/idf/components/esp_driver_sdmmc/legacy/include -I/home/david/esp/idf/components/esp_driver_sd_intf/include -march=rv32imafc_zicsr_zifencei_zaamo_zalrsc_xespv_xesploop -mabi=ilp32f -mtune=esp-base  -fdiagnostics-color=always -ffunction-sections -fdata-sections -Wall -Werror=all -Wno-error=unused-function -Wno-error=unused-variable -Wno-error=unused-but-set-variable -Wno-error=deprecated-declarations -Wextra -Wno-error=extra -Wno-unused-parameter -Wno-sign-compare -Wno-enum-conversion -gdwarf-4 -ggdb -nostartfiles -O2 -fmacro-prefix-map=/home/david/esp/idf/examples/wifi/iperf=. -fmacro-prefix-map=/home/david/esp/idf=/IDF -fstrict-volatile-bitfields -fno-jump-tables -fno-tree-switch-conversion -std=gnu23 -Wno-old-style-declaration -fzero-init-padding-bits=all -fno-malloc-dce -MD -MT esp-idf/espressif__eppp_link/CMakeFiles/__idf_espressif__eppp_link.dir/eppp_uart.c.obj -MF esp-idf/espressif__eppp_link/CMakeFiles/__idf_espressif__eppp_link.dir/eppp_uart.c.obj.d -o esp-idf/espressif__eppp_link/CMakeFiles/__idf_espressif__eppp_link.dir/eppp_uart.c.obj -c /home/david/esp/idf/examples/wifi/iperf/managed_components/espressif__eppp_link/eppp_uart.c
/home/david/esp/idf/examples/wifi/iperf/managed_components/espressif__eppp_link/eppp_uart.c:15:10: fatal error: driver/uart.h: No such file or directory
   15 | #include "driver/uart.h"
      |          ^~~~~~~~~~~~~~~
compilation terminated.
[917/941] Building C object esp-idf/esp_driver_gpio/CMakeFiles/__idf_esp_driver_gpio.dir/src/gpio.c.obj
ninja: build stopped: subcommand failed.
Compilation failed because eppp_uart.c (in "espressif__eppp_link" component) includes driver/uart.h, provided by esp_driver_uart component(s).
However, esp_driver_uart component(s) is not in the requirements list of "espressif__eppp_link".
To fix this, add esp_driver_uart to PRIV_REQUIRES list of idf_component_register call in /home/david/esp/idf/examples/wifi/iperf/managed_components/espressif__eppp_link/CMakeLists.txt.
ninja failed with exit code 1, output of the command is in the /home/david/esp/idf/examples/wifi/iperf/build/log/idf_py_stderr_output_22375 and /home/david/esp/idf/examples/wifi/iperf/build/log/idf_py_stdout_output_22375

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with the latest master