Fix S3 deep sleep

Adding `-u ld_include_highint_hdl` forces the linker to keep the
high priority interrupt handler that calls the ipc_isr handler.

The deep sleep is waiting for this interrupt to be handled on core
0 before sleeping from core 1.

Fixes #6090

Author: tannewt

ports/espressif/Makefile

@@ -422,7 +422,7 @@ esp-idf-stamp: $(BUILD)/esp-idf/config/sdkconfig.h
 
 $(BUILD)/firmware.elf: $(OBJ) | esp-idf-stamp
 	$(STEPECHO) "LINK $@"
-	$(Q)$(CC) -o $@ $(LDFLAGS) $^ -Wl,--start-group $(ESP_IDF_COMPONENTS_EXPANDED) $(BINARY_BLOBS) $(MBEDTLS_COMPONENTS_LINK_EXPANDED) $(BUILD)/esp-idf/esp-idf/newlib/libnewlib.a  -Wl,--end-group -u newlib_include_pthread_impl -Wl,--start-group $(LIBS) -Wl,--end-group $(BUILD)/esp-idf/esp-idf/pthread/libpthread.a  -u __cxx_fatal_exception
+	$(Q)$(CC) -o $@ $(LDFLAGS) $^ -Wl,--start-group $(ESP_IDF_COMPONENTS_EXPANDED) $(BINARY_BLOBS) $(MBEDTLS_COMPONENTS_LINK_EXPANDED) $(BUILD)/esp-idf/esp-idf/newlib/libnewlib.a  -Wl,--end-group -u newlib_include_pthread_impl -u ld_include_highint_hdl -Wl,--start-group $(LIBS) -Wl,--end-group $(BUILD)/esp-idf/esp-idf/pthread/libpthread.a  -u __cxx_fatal_exception
 
 $(BUILD)/circuitpython-firmware.bin: $(BUILD)/firmware.elf | tools/build_memory_info.py
 	$(STEPECHO) "Create $@"