Add support for Lilygo T3S3 V1.2 SX1276 board (#142)

lib/comms/radio_comms.cpp

@@ -372,9 +372,9 @@ Message *RadioComms::receive(uint16_t timeout_ms)
 {
     uint8_t msg[MAX_MSG];
 
-#ifdef USING_LR1121
+#if defined(USING_LR1121) || defined(USING_SX1276)
     Message *message = NULL;
-#warning Radio Comms not fully supported for LR1121
+#warning Radio Comms not fully supported for LR1121 or SX1276
 #else
     // because of this, receive is single-threaded, single-device
     _received = false;