drm/mediatek: Rename file mtk_drm_ddp to mtk_mutex

After mmsys routing function is moved out of mtk_drm_ddp.c, mtk_drm_ddp.c
has only mtk mutex function, so rename it to match the function in it.

Signed-off-by: CK Hu <ck.hu@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

drivers/gpu/drm/mediatek/Makefile

@@ -4,13 +4,13 @@ mediatek-drm-y := mtk_disp_color.o \
 		  mtk_disp_ovl.o \
 		  mtk_disp_rdma.o \
 		  mtk_drm_crtc.o \
-		  mtk_drm_ddp.o \
 		  mtk_drm_ddp_comp.o \
 		  mtk_drm_drv.o \
 		  mtk_drm_gem.o \
 		  mtk_drm_plane.o \
 		  mtk_dsi.o \
-		  mtk_dpi.o
+		  mtk_dpi.o \
+		  mtk_mutex.o
 
 obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o
 

drivers/gpu/drm/mediatek/mtk_drm_crtc.c

@@ -19,10 +19,10 @@
 
 #include "mtk_drm_drv.h"
 #include "mtk_drm_crtc.h"
-#include "mtk_drm_ddp.h"
 #include "mtk_drm_ddp_comp.h"
 #include "mtk_drm_gem.h"
 #include "mtk_drm_plane.h"
+#include "mtk_mutex.h"
 
 /*
  * struct mtk_drm_crtc - MediaTek specific crtc structure.

drivers/gpu/drm/mediatek/mtk_mutex.c

@@ -10,8 +10,8 @@
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 
-#include "mtk_drm_ddp.h"
 #include "mtk_drm_ddp_comp.h"
+#include "mtk_mutex.h"
 
 #define MT2701_DISP_MUTEX0_MOD0			0x2c
 #define MT2701_DISP_MUTEX0_SOF0			0x30

drivers/gpu/drm/mediatek/mtk_mutex.h

@@ -3,8 +3,8 @@
  * Copyright (c) 2015 MediaTek Inc.
  */
 
-#ifndef MTK_DRM_DDP_H
-#define MTK_DRM_DDP_H
+#ifndef MTK_MUTEX_H
+#define MTK_MUTEX_H
 
 struct regmap;
 struct device;
@@ -23,4 +23,4 @@ void mtk_disp_mutex_put(struct mtk_disp_mutex *mutex);
 void mtk_disp_mutex_acquire(struct mtk_disp_mutex *mutex);
 void mtk_disp_mutex_release(struct mtk_disp_mutex *mutex);
 
-#endif /* MTK_DRM_DDP_H */
+#endif /* MTK_MUTEX_H */