drm/mediatek: Cleanup coding style in mediatek a bit

This code change is to make code bit more readable.
Signed-off-by: NBernard Zhao <bernard@vivo.com>
Signed-off-by: NChun-Kuang Hu <chunkuang.hu@kernel.org>

drivers/gpu/drm/mediatek/mtk_hdmi.c

@@ -311,14 +311,10 @@ static void mtk_hdmi_hw_send_info_frame(struct mtk_hdmi *hdmi, u8 *buffer,
 	u8 checksum;
 	int ctrl_frame_en = 0;
 
-	frame_type = *buffer;
-	buffer += 1;
-	frame_ver = *buffer;
-	buffer += 1;
-	frame_len = *buffer;
-	buffer += 1;
-	checksum = *buffer;
-	buffer += 1;
+	frame_type = *buffer++;
+	frame_ver = *buffer++;
+	frame_len = *buffer++;
+	checksum = *buffer++;
 	frame_data = buffer;
 
 	dev_dbg(hdmi->dev,