esp32/boards/sdkconfig.base: Disable MEMPROT_FEATURE to alloc from IRAM.

Dynamically generate/loaded native code (eg from @micropython.native or
native .mpy files) needs to be able allocate from IRAM, and the memory
protection feature must be disabled for that to work.  Disabling it is
needed to get native code working on ESP32-S2 and -C3.

Signed-off-by: Damien George <damien@micropython.org>

ports/esp32/boards/sdkconfig.base

@@ -29,6 +29,10 @@ CONFIG_ESP32_XTAL_FREQ_AUTO=y
 # Power Management
 CONFIG_PM_ENABLE=y
 
+# Memory protection
+# This is required to allow allocating IRAM
+CONFIG_ESP_SYSTEM_MEMPROT_FEATURE=n
+
 # FreeRTOS
 CONFIG_FREERTOS_THREAD_LOCAL_STORAGE_POINTERS=2
 CONFIG_FREERTOS_SUPPORT_STATIC_ALLOCATION=y