stm32h7/linum-stm32h753bi: add support to leds

[JorgeGzm]

Summary

Add support to leds

Impact

the user can blink the leds of expansion board

Testing

run the command bellow

 nsh> leds
    leds_main: Starting the led_daemon
    leds_main: led_daemon started

    led_daemon (pid# 3): Running
    led_daemon: Opening /dev/userleds
    led_daemon: Supported LEDs 0x07
    led_daemon: LED set 0x01
    nsh> led_daemon: LED set 0x02
    led_daemon: LED set 0x03

[xiaoxiang781216]

this patch generate the following ci error, @JorgeGzm could you provide a patch to fix it as soon as possible:

====================================================================================
Configuration/Tool: linum-stm32h753bi/leds,CONFIG_ARM_TOOLCHAIN_CLANG
------------------------------------------------------------------------------------
  Cleaning...
  Configuring...
  Disabling CONFIG_ARM_TOOLCHAIN_GNU_EABI
  Enabling CONFIG_ARM_TOOLCHAIN_CLANG
  Building NuttX...
ld.lld: error: undefined symbol: board_userled_initialize
>>> referenced by userled_lower.c:148 (/github/workspace/sources/nuttx/drivers/leds/userled_lower.c:148)
>>>               userled_lower.o:(userled_lower_initialize) in archive /github/workspace/sources/nuttx/staging/libdrivers.a

ld.lld: error: undefined symbol: board_userled
>>> referenced by userled_lower.c:100 (/github/workspace/sources/nuttx/drivers/leds/userled_lower.c:100)
>>>               userled_lower.o:(userled_setled) in archive /github/workspace/sources/nuttx/staging/libdrivers.a

ld.lld: error: undefined symbol: board_userled_all
>>> referenced by userled_lower.c:114 (/github/workspace/sources/nuttx/drivers/leds/userled_lower.c:114)
>>>               userled_lower.o:(userled_setall) in archive /github/workspace/sources/nuttx/staging/libdrivers.a
make[1]: *** [Makefile:197: nuttx] Error 1
make: *** [tools/Unix.mk:546: nuttx] Error 2
make: Target 'all' not remade because of errors.
/github/workspace/sources/nuttx/tools/testbuild.sh: line 370: /github/workspace/sources/nuttx/../nuttx/nuttx.manifest: No such file or directory
  Normalize linum-stm32h753bi/leds
HEAD detached at pull/12009/merge
Untracked files:
  (use "git add <file>..." to include in what will be committed)
	boards/arm/stm32h7/linum-stm32h753bi/scripts/flash.ld.tmp