AP_Math: move location define to Location class

libraries/AP_Common/Location.h

@@ -114,4 +114,10 @@ public:
 
 private:
     static AP_Terrain *_terrain;
+
+    // scaling factor from 1e-7 degrees to meters at equator
+    // == 1.0e-7 * DEG_TO_RAD * RADIUS_OF_EARTH
+    static constexpr float LOCATION_SCALING_FACTOR = 0.011131884502145034f;
+    // inverse of LOCATION_SCALING_FACTOR
+    static constexpr float LOCATION_SCALING_FACTOR_INV = 89.83204953368922f;
 };

libraries/AP_Math/location.h

@@ -4,13 +4,6 @@
 
 #include "vector2.h"
 #include "vector3.h"
-#include <AP_Common/Location.h>
-
-// scaling factor from 1e-7 degrees to meters at equator
-// == 1.0e-7 * DEG_TO_RAD * RADIUS_OF_EARTH
-#define LOCATION_SCALING_FACTOR 0.011131884502145034f
-// inverse of LOCATION_SCALING_FACTOR
-#define LOCATION_SCALING_FACTOR_INV 89.83204953368922f
 
 /*
  * LOCATION