fix possible compile issue with esp32 core

Author: hathach

src/device/usbd.c

@@ -506,6 +506,10 @@ void tud_task_ext(uint32_t timeout_ms, bool in_isr)
       break;
 
       case DCD_EVENT_SETUP_RECEIVED:
+// FIXME arduino-esp32 takes time to upgrade tinyusb
+#ifndef TU_LOG_PTR
+#define TU_LOG_PTR  TU_LOG_VAR
+#endif
         TU_LOG_PTR(USBD_DBG, &event.setup_received);
         TU_LOG(USBD_DBG, "\r\n");