Allow for both BT and RTL_433 Gateways at the same time. (#1491)

* Allow for both BT and RTL_433 Gateways at the same time.

* Fix linting error.

main/ZgatewayRTL_433.ino

@@ -47,9 +47,9 @@ SemaphoreHandle_t semaphorecreateOrUpdateDeviceRTL_433;
 std::vector<RTL_433device*> RTL_433devices;
 int newRTL_433Devices = 0;
 
-static RTL_433device NO_DEVICE_FOUND = {{0},
-                                        0,
-                                        false};
+static RTL_433device NO_RTL_433_DEVICE_FOUND = {{0},
+                                                0,
+                                                false};
 
 RTL_433device* getDeviceById(const char* id); // Declared here to avoid pre-compilation issue (misplaced auto declaration by pio)
 RTL_433device* getDeviceById(const char* id) {
@@ -60,7 +60,7 @@ RTL_433device* getDeviceById(const char* id) {
       return *it;
     }
   }
-  return &NO_DEVICE_FOUND;
+  return &NO_RTL_433_DEVICE_FOUND;
 }
 
 void dumpRTL_433Devices() {
@@ -79,7 +79,7 @@ void createOrUpdateDeviceRTL_433(const char* id, const char* model, uint8_t flag
   }
 
   RTL_433device* device = getDeviceById(id);
-  if (device == &NO_DEVICE_FOUND) {
+  if (device == &NO_RTL_433_DEVICE_FOUND) {
     Log.trace(F("add %s" CR), id);
     //new device
     device = new RTL_433device();
@@ -360,4 +360,4 @@ extern int getOOKThresh() {
 }
 #  endif
 
-#endif
+#endif