soc: mediatek: add vdec item for scpsys

for some chips, there is vdec item in scpsys, this patch adds it.
Signed-off-by: NMars Cheng <mars.cheng@mediatek.com>
Signed-off-by: NMatthias Brugger <matthias.bgg@gmail.com>

drivers/soc/mediatek/mtk-scpsys.c

@@ -71,6 +71,7 @@ enum clk_id {
 	CLK_VENC,
 	CLK_VENC_LT,
 	CLK_ETHIF,
+	CLK_VDEC,
 	CLK_MAX,
 };
 
@@ -81,6 +82,7 @@ static const char * const clk_names[] = {
 	"venc",
 	"venc_lt",
 	"ethif",
+	"vdec",
 	NULL,
 };