AP_Compass: add set_dev_id when initialising HIL

libraries/AP_Compass/AP_Compass_HIL.cpp

@@ -54,6 +54,7 @@ AP_Compass_HIL::init(void)
         if (!register_compass(dev_id, _compass_instance[i])) {
             return false;
         }
+        set_dev_id(_compass_instance[i], dev_id);
     }
     return true;
 }