AP_Soaring: Move define to config file

* Prepare for more compile time features in soaring

Signed-off-by: Ryan Friedman <[email protected]>

Author: Ryanf55

libraries/AP_Soaring/AP_Soaring.h

@@ -9,12 +9,7 @@
 
 #pragma once
 
-#include <AP_HAL/AP_HAL_Boards.h>
-
-#ifndef HAL_SOARING_ENABLED
-#define HAL_SOARING_ENABLED 1
-#endif
-
+#include "AP_Soaring_config.h"
 #if HAL_SOARING_ENABLED
 
 #include <AP_Param/AP_Param.h>

libraries/AP_Soaring/AP_Soaring_config.h

@@ -0,0 +1,5 @@
+#include <AP_HAL/AP_HAL_Boards.h>
+
+#ifndef HAL_SOARING_ENABLED
+#define HAL_SOARING_ENABLED 1
+#endif