correct sonoff rf bridge issue not communicating with RF module

#310

OpenMQTTGateway.ino

@@ -255,10 +255,13 @@ void setup()
   Serial.begin(SERIAL_BAUD);
   
   #if defined(ESP8266) || defined(ESP32)
+  
     #ifdef ESP8266
+      #ifndef ZgatewaySRFB // if we are not in sonoff rf bridge case we apply the ESP8266 pin optimization
         Serial.end();
         Serial.begin(SERIAL_BAUD, SERIAL_8N1, SERIAL_TX_ONLY);// enable on ESP8266 to free some pin
       #endif
+    #endif
     
     #if defined(ESP8266) && !defined(ESPWifiManualSetup)
       setup_wifimanager();