[SX126x] Added getMod implementation

src/modules/SX126x/SX126x.cpp

@@ -1717,6 +1717,10 @@ int16_t SX126x::setDio2AsRfSwitch(bool enable) {
   return(this->mod->SPIwriteStream(RADIOLIB_SX126X_CMD_SET_DIO2_AS_RF_SWITCH_CTRL, &data, 1));
 }
 
+Module* SX126x::getMod() {
+  return(this->mod);
+}
+
 int16_t SX126x::setFs() {
   return(this->mod->SPIwriteStream(RADIOLIB_SX126X_CMD_SET_FS, NULL, 0));
 }