This commit adds symbols from the ringbuf.c file which can be placed in Flash in order to free up IRAM space.
esp-ringbuf funtion placement is now controlled by its own configs: CONFIG_RINGBUF_PLACE_FUNCTIONS_INTO_FLASH and CONFIG_RINGBUF_PLACE_ISR_FUNCTIONS_INTO_FLASH Closes https://github.com/espressif/esp-idf/issues/9198