use px4_defines header to distinguish platform

src/lib/mathlib/math/Limits.hpp

@@ -39,7 +39,7 @@
 
 #pragma once
 
-#include <platforms/px4_config.h>
+#include <platforms/px4_defines.h>
 #include <stdint.h>
 
 namespace math {

src/lib/mathlib/math/Vector.hpp

@@ -50,7 +50,7 @@
 #include "../CMSIS/Include/arm_math.h"
 #else
 #include <math/eigen_math.h>
-#include <Eigen/Eigen>
+//#include <Eigen/Eigen>
 #endif
 
 namespace math