analyzer_motorbalance: add tri frame motor count
analyzer_motorbalance: add tri frame motor count

dronekit/dronekit-la,dronekit/dronekit-la,peterbarker/dronekit-la,peterbarker/dronekit-la,peterbarker/dronekit-la,dronekit/dronekit-la,dronekit/dronekit-la,peterbarker/dronekit-la