drm_hwcomposer: move header files into source directory

... to improve navigation between source/header file.
Unnecessary dependencies also removed.

Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
Change-Id: I2c3bf993b8c5f356490433fd94e90011487a1276
diff --git a/platform/platformdrmgeneric.h b/platform/platformdrmgeneric.h
index ad74de4..4284093 100644
--- a/platform/platformdrmgeneric.h
+++ b/platform/platformdrmgeneric.h
@@ -17,13 +17,13 @@
 #ifndef ANDROID_PLATFORM_DRM_GENERIC_H_
 #define ANDROID_PLATFORM_DRM_GENERIC_H_
 
-#include "drmdevice.h"
-#include "platform.h"
-
+#include <drm/drm_fourcc.h>
 #include <hardware/gralloc.h>
+
 #include <map>
 
-#include <drm/drm_fourcc.h>
+#include "drm/drmdevice.h"
+#include "platform.h"
 
 #ifndef DRM_FORMAT_INVALID
 #define DRM_FORMAT_INVALID 0