Implement remote lna toggle cli cmd

variants/rak3401/target.h

@@ -28,3 +28,8 @@ uint32_t radio_get_rng_seed();
 void radio_set_params(float freq, float bw, uint8_t sf, uint8_t cr);
 void radio_set_tx_power(int8_t dbm);
 mesh::LocalIdentity radio_new_identity();
+
+#if defined(USE_SX1262) || defined(USE_SX1268)
+bool radio_get_rx_boosted_gain_mode();
+void radio_set_rx_boosted_gain_mode(bool rxbgm);
+#endif