move baro and magnetometer data out of sensor_combined

src/modules/local_position_estimator/sensors/baro.cpp

@@ -41,9 +41,9 @@ int BlockLocalPositionEstimator::baroMeasure(Vector<float, n_y_baro> &y)
 {
 	//measure
 	y.setZero();
-	y(0) = _sub_sensor.get().baro_alt_meter;
+	y(0) = _sub_airdata.get().baro_alt_meter;
 	_baroStats.update(y);
-	_time_last_baro = _timeStamp;
+	_time_last_baro = _sub_airdata.get().timestamp;
 	return OK;
 }