drm/mediatek: Support MT8188 VDOSYS1 in display driver

- The mmsys_dev_num in MT8188 VDOSYS0 was set to 1 since
  VDOSYS1 was not available before. Increase it to support
  VDOSYS1 in display driver.
- Add compatible name for MT8188 VDOSYS1
  (shares the same driver data with MT8195 VDOSYS1)
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20231214055847.4936-24-shawn.sung@mediatek.com/Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>

drivers/gpu/drm/mediatek/mtk_drm_drv.c

@@ -293,7 +293,7 @@ static const struct mtk_mmsys_driver_data mt8188_vdosys0_driver_data = {
 	.main_len = ARRAY_SIZE(mt8188_mtk_ddp_main),
 	.conn_routes = mt8188_mtk_ddp_main_routes,
 	.num_conn_routes = ARRAY_SIZE(mt8188_mtk_ddp_main_routes),
-	.mmsys_dev_num = 1,
+	.mmsys_dev_num = 2,
 };
 
 static const struct mtk_mmsys_driver_data mt8192_mmsys_driver_data = {
@@ -334,6 +334,8 @@ static const struct of_device_id mtk_drm_of_ids[] = {
 	  .data = &mt8186_mmsys_driver_data},
 	{ .compatible = "mediatek,mt8188-vdosys0",
 	  .data = &mt8188_vdosys0_driver_data},
+	{ .compatible = "mediatek,mt8188-vdosys1",
+	  .data = &mt8195_vdosys1_driver_data},
 	{ .compatible = "mediatek,mt8192-mmsys",
 	  .data = &mt8192_mmsys_driver_data},
 	{ .compatible = "mediatek,mt8195-mmsys",