espressif: xtensa_esp32s3: do not reference _window_spill

Test

Signed-off-by: Sylvio Alves <[email protected]>

Author: sylvioalves

configs/xtensa-espressif_esp32s3_zephyr-elf.config

@@ -6,4 +6,5 @@ CT_ARCH_XTENSA=y
 CT_XTENSA_CUSTOM=y
 CT_TARGET_VENDOR="espressif_esp32s3_zephyr"
 CT_TARGET_CFLAGS="-mlongcalls -ftls-model=local-exec"
+CT_LIBC_NEWLIB_TARGET_CFLAGS="-mcall0 -mlongcalls"
 CT_CC_GCC_CONFIG_TLS=n