RC_Channel: added motor tilt auxillary channel

libraries/RC_Channel/RC_Channel_aux.cpp

@@ -114,6 +114,10 @@ void RC_Channel_aux::aux_servo_function_setup(void)
     case RC_Channel_aux::k_flaperon2:
         set_angle_out(4500);
         break;
+    case RC_Channel_aux::k_motor_tilt:
+        // tenth percentage tilt
+        set_range_out(0,1000);
+        break;
     default:
         break;
     }

libraries/RC_Channel/RC_Channel_aux.h

@@ -74,6 +74,7 @@ public:
         k_motor6                = 38,
         k_motor7                = 39,
         k_motor8                = 40,
+        k_motor_tilt            = 41,            ///< tiltrotor motor tilt control
         k_rcin1                 = 51,            ///< these are for pass-thru from arbitrary rc inputs
         k_rcin2                 = 52,
         k_rcin3                 = 53,