a fix against regression of Actions build

Author: lyusupov

src/main.c

@@ -239,10 +239,12 @@ static void check_dfu_mode(void) {
   bool dfu_start = _ota_dfu || serial_only_dfu || uf2_dfu ||
                    (((*dbl_reset_mem) == DFU_DBL_RESET_MAGIC) && reason_reset_pin);
 
+#if defined(_LILYGO_TECHO_H)
   if ((NRF_POWER->RESETREAS & POWER_RESETREAS_VBUS_Msk) && dfu_skip) {
     NRF_POWER->RESETREAS |= POWER_RESETREAS_VBUS_Msk;
     NRF_POWER->SYSTEMOFF = 1;
   }
+#endif /* _LILYGO_TECHO_H */
 
   // Clear GPREGRET if it is our values
   if (dfu_start || dfu_skip) NRF_POWER->GPREGRET = 0;