Fix Seeed XIAO ESP32S3 PSRAM (platformio#1082)

Author: alwint3r

boards/seeed_xiao_esp32s3.json

@@ -3,11 +3,12 @@
     "arduino": {
       "ldscript": "esp32s3_out.ld",
       "partitions": "default_8MB.csv",
-      "memory_type": "qio_qspi"
+      "memory_type": "qio_opi"
     },
     "core": "esp32",
     "extra_flags": [
       "-DARDUINO_XIAO_ESP32S3",
+      "-DBOARD_HAS_PSRAM",
       "-DARDUINO_USB_MODE=1",
       "-DARDUINO_USB_CDC_ON_BOOT=1",
       "-DARDUINO_RUNNING_CORE=1",