power: release PMU devices before deleting the i2c bus on M5CoreS3

Since ESP-IDF v5.5 i2c_del_master_bus() refuses to delete a bus that
still has devices attached and returns ESP_ERR_INVALID_STATE. On the
M5CoreS3, power_init() attaches the axp2101 and aw9523 devices and
then deletes the bus without releasing them, so under IDF 5.5.4 the
deinit fails, power_init() propagates the error and the JADE_ASSERT
in main.c aborts the boot. Same root cause as the touchscreen fix in
the previous commit (#306).

Remove both devices from the bus before deleting it.

Not tested on hardware (none available); the change mirrors the
touchscreen fix validated on the Waveshare S3 Touch LCD 2.

Author: cateim

main/power/m5stackcores3.inc

@@ -48,6 +48,9 @@ esp_err_t power_init(void)
     axp2101_init();
 
     vTaskDelay(100 / portTICK_PERIOD_MS);
+    // Since IDF 5.5 the i2c bus cannot be deleted while devices are still attached
+    I2C_CHECK_RET(i2c_master_bus_rm_device(axp2101));
+    I2C_CHECK_RET(i2c_master_bus_rm_device(aw9523));
     I2C_CHECK_RET(_i2c_deinit(NULL));
 
     return ESP_OK;