boards/risc-v: increase init stacksize for efuse defconfig on ESP32-C6

[fdcavalcanti]

Summary

• boards/risc-v: increase init stacksize for efuse defconfig on ESP32-C6

Fixes a crash when executing basic commands on the efuse defconfig.

Signed-off-by: Filipe Cavalcanti filipe.cavalcanti@espressif.com

Impact

Impact on user: Yes, fixes efuse defconfig crash.

Impact on build: No.

Impact on hardware: No.

Impact on documentation: No.

Impact on security: No.

Impact on compatibility: No.

Testing

Build esp32c3-devkit:efuse and execute ps command.

Building

• ./tools/configure.sh esp32c6-devkitc:efuse
• Enable debug assertions
• Make and flash

Running

Boot the device and execute ps command.

Results

Before changes:

nsh> ps
  TID   PID  PPID PRI POLICY   TYPE    NPX STATE    EVENT     riscv_exception: EXCEPTION: Load access fault. MCAUSE: 00000005, EPC: 40031e3e, MTVAL: 5f68736e
riscv_exception: PANIC!!! Exception = 00000005
dump_assert_info: Current Version: NuttX  12.12.0 72be575b1a Mar 10 2026 12:09:09 risc-v
dump_assert_info: Assertion failed panic: at file: common/riscv_exception.c:134 task: nsh_main process: nsh_main 0x4200fa0a
...

After changes:

nsh> ps
  TID   PID  PPID PRI POLICY   TYPE    NPX STATE    EVENT     SIGMASK            STACK COMMAND
    0     0     0   0 FIFO     Kthread   - Ready              0000000000000000 0002016 Idle_Task
    1     1     0 100 RR       Task      - Running            0000000000000000 0004032 nsh_main
nsh>