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/utils/hwcutils.cpp b/utils/hwcutils.cpp
index 324d855..2dc7e7b 100644
--- a/utils/hwcutils.cpp
+++ b/utils/hwcutils.cpp
@@ -17,12 +17,12 @@
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 #define LOG_TAG "hwc-drm-utils"
 
-#include "drmhwcomposer.h"
-#include "platform.h"
-
 #include <log/log.h>
 #include <ui/GraphicBufferMapper.h>
 
+#include "drmhwcomposer.h"
+#include "platform/platform.h"
+
 #define UNUSED(x) (void)(x)
 
 namespace android {