esp32: Enable machine.USBDevice to configure USB at runtime.

This adds support for `machine.USBDevice` to S2 and S3 boards.

Signed-off-by: Sebastian Romero <s.romero@arduino.cc>

ports/esp32/main.c

@@ -183,6 +183,10 @@ soft_reset_exit:
     mp_thread_deinit();
     #endif
 
+    #if MICROPY_HW_ENABLE_USB_RUNTIME_DEVICE
+    mp_usbd_deinit();
+    #endif
+
     gc_sweep_all();
 
     // Free any native code pointers that point to iRAM.