esp32: Remove the ESP32 ringbuffer linker workaround.

Reverts workaround added in acbdbcd.

According to the linked ESP-IDF issue this was only a problem for ESP-IDF
V5.0.x, and support for versions older than V5.2 was dropped in 6e5d8d0.

This work was funded through GitHub Sponsors.

Signed-off-by: Angus Gratton <angus@redyak.com.au>

Author: projectgus

ports/esp32/boards/sdkconfig.spiram

@@ -13,6 +13,6 @@ CONFIG_SPIRAM_MALLOC_ALWAYSINTERNAL=8192
 # to PSRAM bug workarounds.  Apply some options to reduce the firmware size.
 CONFIG_COMPILER_OPTIMIZATION_SIZE=y
 CONFIG_COMPILER_OPTIMIZATION_CHECKS_SILENT=y
-# CONFIG_RINGBUF_PLACE_FUNCTIONS_INTO_FLASH=y # Workaround required: see main_esp32/linker.lf
+CONFIG_RINGBUF_PLACE_FUNCTIONS_INTO_FLASH=y
 CONFIG_FREERTOS_PLACE_FUNCTIONS_INTO_FLASH=y
 CONFIG_FREERTOS_PLACE_SNAPSHOT_FUNS_INTO_FLASH=y

ports/esp32/esp32_common.cmake

@@ -193,8 +193,6 @@ list(APPEND IDF_COMPONENTS
 # Provide the default LD fragment if not set
 if (MICROPY_USER_LDFRAGMENTS)
     set(MICROPY_LDFRAGMENTS ${MICROPY_USER_LDFRAGMENTS})
-else()
-    set(MICROPY_LDFRAGMENTS linker_esp32.lf)
 endif()
 
 # Register the main IDF component.