clk/soc: mediatek: mt6797: Bind clock driver from platform device

The mmsys driver is now the top level entry point for the multimedia
system (mmsys), we bind the clock driver by creating a platform device.
We also bind the MediaTek DRM driver which is not yet implement and
therefor will errror out for now.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Reviewed-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20200518113156.25009-2-matthias.bgg@kernel.org
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
diff --git a/drivers/clk/mediatek/clk-mt6797-mm.c b/drivers/clk/mediatek/clk-mt6797-mm.c
index 8f05653..01fdce2 100644
--- a/drivers/clk/mediatek/clk-mt6797-mm.c
+++ b/drivers/clk/mediatek/clk-mt6797-mm.c
@@ -92,16 +92,12 @@ static const struct mtk_gate mm_clks[] = {
 		 "clk26m", 3),
 };
 
-static const struct of_device_id of_match_clk_mt6797_mm[] = {
-	{ .compatible = "mediatek,mt6797-mmsys", },
-	{}
-};
-
 static int clk_mt6797_mm_probe(struct platform_device *pdev)
 {
+	struct device *dev = &pdev->dev;
+	struct device_node *node = dev->parent->of_node;
 	struct clk_onecell_data *clk_data;
 	int r;
-	struct device_node *node = pdev->dev.of_node;
 
 	clk_data = mtk_alloc_clk_data(CLK_MM_NR);
 
@@ -121,7 +117,6 @@ static struct platform_driver clk_mt6797_mm_drv = {
 	.probe = clk_mt6797_mm_probe,
 	.driver = {
 		.name = "clk-mt6797-mm",
-		.of_match_table = of_match_clk_mt6797_mm,
 	},
 };