sensors (accel/gyro/mag) determine if external with device id

src/lib/sensor_calibration/Utilities.hpp

@@ -132,4 +132,11 @@ Rotation GetBoardRotation();
  */
 matrix::Dcmf GetBoardRotationMatrix();
 
+/**
+ * @brief Determine if device is on an external bus
+ *
+ * @return true if device is on an external bus
+ */
+bool DeviceExternal(uint32_t device_id);
+
 } // namespace calibration