sensors/vehicle_angular_velocity: silence gyro selection fallback war…

…ning (PX4_WARN -> PX4_DEBUG)

 - this warning was to catch any potential errors in sensor selection
   relative to what's actually available, we don't need to complain
   about initial selection before the EKF selector is available

src/modules/sensors/vehicle_angular_velocity/VehicleAngularVelocity.cpp

@@ -277,7 +277,7 @@ bool VehicleAngularVelocity::SensorSelectionUpdate(const hrt_abstime &time_now_u
 					// if no gyro was selected use the first valid sensor_gyro_fifo
 					if (!device_id_valid) {
 						device_id = sensor_gyro_fifo_sub.get().device_id;
-						PX4_WARN("no gyro selected, using sensor_gyro_fifo:%" PRIu8 " %" PRIu32, i, sensor_gyro_fifo_sub.get().device_id);
+						PX4_DEBUG("no gyro selected, using sensor_gyro_fifo:%" PRIu8 " %" PRIu32, i, sensor_gyro_fifo_sub.get().device_id);
 					}
 
 					if (sensor_gyro_fifo_sub.get().device_id == device_id) {
@@ -319,7 +319,7 @@ bool VehicleAngularVelocity::SensorSelectionUpdate(const hrt_abstime &time_now_u
 					// if no gyro was selected use the first valid sensor_gyro
 					if (!device_id_valid) {
 						device_id = sensor_gyro_sub.get().device_id;
-						PX4_WARN("no gyro selected, using sensor_gyro:%" PRIu8 " %" PRIu32, i, sensor_gyro_sub.get().device_id);
+						PX4_DEBUG("no gyro selected, using sensor_gyro:%" PRIu8 " %" PRIu32, i, sensor_gyro_sub.get().device_id);
 					}
 
 					if (sensor_gyro_sub.get().device_id == device_id) {