drm/mediatek: Rename files "mtk_drm_ddp_comp.c" to "mtk_ddp_comp.c"

Rename files mtk_drm_ddp_comp.c to mtk_ddp_comp.c and
modify the Makefile accordingly.

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

Author: Hsiao Chien Sung

drivers/gpu/drm/mediatek/Makefile

@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
 mediatek-drm-y := mtk_crtc.o \
+		  mtk_ddp_comp.o \
 		  mtk_disp_aal.o \
 		  mtk_disp_ccorr.o \
 		  mtk_disp_color.o \
@@ -9,7 +10,6 @@ mediatek-drm-y := mtk_crtc.o \
 		  mtk_disp_ovl.o \
 		  mtk_disp_ovl_adaptor.o \
 		  mtk_disp_rdma.o \
-		  mtk_drm_ddp_comp.o \
 		  mtk_drm_drv.o \
 		  mtk_drm_gem.o \
 		  mtk_drm_plane.o \