disable RMTHI on -S2

my Lolin S2 mini "ESP32-S2FNR2 (revision v0.0)" get into a boot loop with the RMTHI driver enabled. More debugging tomorrow.

Author: softhack007

platformio.ini

@@ -501,6 +501,7 @@ build_flags = -g
   -DARDUINO_USB_MODE=0 ;; this flag is mandatory for ESP32-S2 !
   ;; please make sure that the following flags are properly set (to 0 or 1) by your board.json, or included in your custom platformio_override.ini entry:
   ;; ARDUINO_USB_CDC_ON_BOOT
+  -D WLED_USE_SHARED_RMT ;; RMTHI fails miserably on my Lolin S2 mini "ESP32-S2FNR2 (revision v0.0)" - I don't know why (boot loop when trying to connect wifi)
 
 lib_deps =
   esp32async/AsyncTCP @ 3.4.7