Move windows headers to port.c

This prevents the inclusion of windows.h. into all header files using
FreeRTOS.h and thus defining several macros conflicting with common
definitions.

Author: creiter64

portable/MSVC-MingW/port.c

@@ -33,6 +33,14 @@
 #include "FreeRTOS.h"
 #include "task.h"
 
+#ifdef WIN32_LEAN_AND_MEAN
+    #include <winsock2.h>
+#else
+    #include <winsock.h>
+#endif
+
+#include <timeapi.h>
+
 #ifdef __GNUC__
     #include "mmsystem.h"
 #else

portable/MSVC-MingW/portmacro.h

@@ -29,17 +29,6 @@
 #ifndef PORTMACRO_H
 #define PORTMACRO_H
 
-#ifdef WIN32_LEAN_AND_MEAN
-    #include <winsock2.h>
-#else
-    #include <winsock.h>
-#endif
-
-#include <windows.h>
-#include <timeapi.h>
-#include <mmsystem.h>
-#include <winbase.h>
-
 #ifdef __cplusplus
 extern "C" {
 #endif