soc: mediatek: remove DDP_DOMPONENT_DITHER from enum

After mmsys and drm change DITHER enum to DDP_COMPONENT_DITHER0,
mmsys header can remove the useless DDP_COMPONENT_DITHER enum.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Acked-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/20230306080659.15261-3-jason-jh.lin@mediatek.com
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>

Author: Jason-JH.Lin

include/linux/soc/mediatek/mtk-mmsys.h

@@ -27,8 +27,7 @@ enum mtk_ddp_comp_id {
 	DDP_COMPONENT_CCORR,
 	DDP_COMPONENT_COLOR0,
 	DDP_COMPONENT_COLOR1,
-	DDP_COMPONENT_DITHER,
-	DDP_COMPONENT_DITHER0 = DDP_COMPONENT_DITHER,
+	DDP_COMPONENT_DITHER0,
 	DDP_COMPONENT_DITHER1,
 	DDP_COMPONENT_DP_INTF0,
 	DDP_COMPONENT_DP_INTF1,