UAVCAN: initialize device id for mag and baro to allow DEVIOCGDEVICEID ioctl to return useful data

src/modules/uavcan/sensors/sensor_bridge.hpp

@@ -112,6 +112,8 @@ protected:
 	_channels(new Channel[MaxChannels])
 	{
 		memcpy(_orb_topics, orb_topics, sizeof(orb_id_t) * MaxChannels);
+		_device_id.devid_s.bus_type = DeviceBusType_UAVCAN;
+		_device_id.devid_s.bus = 1; // @TBD: insert UAVCAN bus no. here
 	}
 
 	/**