mavlink: Handle new auto sub states.

src/modules/mavlink/mavlink_messages.cpp

@@ -162,6 +162,8 @@ void get_mavlink_mode_state(struct vehicle_status_s *status, struct position_set
 			break;
 
 		case NAVIGATION_STATE_AUTO_RTL:
+			/* fallthrough */
+		case NAVIGATION_STATE_AUTO_RCRECOVER:
 			*mavlink_base_mode |= MAV_MODE_FLAG_AUTO_ENABLED
 			                      | MAV_MODE_FLAG_STABILIZE_ENABLED
 					      | MAV_MODE_FLAG_GUIDED_ENABLED;
@@ -170,6 +172,8 @@ void get_mavlink_mode_state(struct vehicle_status_s *status, struct position_set
 			break;
 
 		case NAVIGATION_STATE_LAND:
+		case NAVIGATION_STATE_AUTO_LANDENGFAIL:
+		case NAVIGATION_STATE_AUTO_LANDGPSFAIL:
 			/* fallthrough */
 		case NAVIGATION_STATE_DESCEND:
 			*mavlink_base_mode |= MAV_MODE_FLAG_AUTO_ENABLED