fix build for esp32 targets

src/esp32/main-esp32.cpp

@@ -9,6 +9,7 @@
 #include "utils.h"
 #include <nvs.h>
 #include <nvs_flash.h>
+#include <driver/rtc_io.h>
 
 void getMacAddr(uint8_t *dmac)
 {