Remove MavLink dependency in navigator

src/modules/navigator/navigation.h

@@ -90,6 +90,11 @@ enum NAV_CMD {
 	NAV_CMD_VIDEO_START_CAPTURE = 2500,
 	NAV_CMD_VIDEO_STOP_CAPTURE = 2501,
 	NAV_CMD_DO_VTOL_TRANSITION = 3000,
+	NAV_CMD_FENCE_RETURN_POINT = 5000,
+	NAV_CMD_FENCE_POLYGON_VERTEX_INCLUSION = 5001,
+	NAV_CMD_FENCE_POLYGON_VERTEX_EXCLUSION = 5002,
+	NAV_CMD_FENCE_CIRCLE_INCLUSION = 5003,
+	NAV_CMD_FENCE_CIRCLE_EXCLUSION = 5004,
 	NAV_CMD_INVALID = UINT16_MAX /* ensure that casting a large number results in a specific error */
 };
 
@@ -98,6 +103,22 @@ enum ORIGIN {
 	ORIGIN_ONBOARD
 };
 
+/* compatible to mavlink MAV_FRAME */
+enum NAV_FRAME {
+	NAV_FRAME_GLOBAL = 0,
+	NAV_FRAME_LOCAL_NED = 1,
+	NAV_FRAME_MISSION = 2,
+	NAV_FRAME_GLOBAL_RELATIVE_ALT = 3,
+	NAV_FRAME_LOCAL_ENU = 4,
+	NAV_FRAME_GLOBAL_INT = 5,
+	NAV_FRAME_GLOBAL_RELATIVE_ALT_INT = 6,
+	NAV_FRAME_LOCAL_OFFSET_NED = 7,
+	NAV_FRAME_BODY_NED = 8,
+	NAV_FRAME_BODY_OFFSET_NED = 9,
+	NAV_FRAME_GLOBAL_TERRAIN_ALT = 10,
+	NAV_FRAME_GLOBAL_TERRAIN_ALT_INT = 11
+};
+
 /**
  * @addtogroup topics
  * @{