drm/mediatek: Rename files "mtk_drm_plane.h" to "mtk_plane.h"

Rename files mtk_drm_plane.h to mtk_plane.h.

Reviewed-by: AngeloGioacchino Del Regno <[e-mail]>
Reviewed-by: CK Hu <[e-mail]>
Signed-off-by: Hsiao Chien Sung <[e-mail]>
Link: https://patchwork.kernel.org/project/dri-devel/patch/[e-mail]/
Signed-off-by: Chun-Kuang Hu <[e-mail]>

drivers/gpu/drm/mediatek/mtk_crtc.c

···
 #include "mtk_ddp_comp.h"
 #include "mtk_drm_drv.h"
 #include "mtk_drm_gem.h"
-#include "mtk_drm_plane.h"
+#include "mtk_plane.h"
 
 /*
  * struct mtk_crtc - MediaTek specific crtc structure.

drivers/gpu/drm/mediatek/mtk_crtc.h

···
 #include <drm/drm_crtc.h>
 #include "mtk_ddp_comp.h"
 #include "mtk_drm_drv.h"
-#include "mtk_drm_plane.h"
+#include "mtk_plane.h"
 
 #define MTK_MAX_BPC	10
 #define MTK_MIN_BPC	3

drivers/gpu/drm/mediatek/mtk_ddp_comp.c

···
 #include "mtk_ddp_comp.h"
 #include "mtk_disp_drv.h"
 #include "mtk_drm_drv.h"
-#include "mtk_drm_plane.h"
+#include "mtk_plane.h"
 
 
 #define DISP_REG_DITHER_EN			0x0000

drivers/gpu/drm/mediatek/mtk_disp_drv.h

···
 #include <linux/soc/mediatek/mtk-cmdq.h>
 #include <linux/soc/mediatek/mtk-mmsys.h>
 #include <linux/soc/mediatek/mtk-mutex.h>
-#include "mtk_drm_plane.h"
 #include "mtk_mdp_rdma.h"
+#include "mtk_plane.h"
 
 int mtk_aal_clk_enable(struct device *dev);
 void mtk_aal_clk_disable(struct device *dev);

drivers/gpu/drm/mediatek/mtk_drm_plane.c

···
 #include "mtk_ddp_comp.h"
 #include "mtk_drm_drv.h"
 #include "mtk_drm_gem.h"
-#include "mtk_drm_plane.h"
+#include "mtk_plane.h"
 
 static const u64 modifiers[] = {
 	DRM_FORMAT_MOD_LINEAR,