[][OpenWrt Dev][Add mmc support to mt7986]

[Description]
Add mmc support to mt7986

[Release-log]
N/A

Change-Id: Ief15334be21b012bd6346550ba7d3e14174fdaa1
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/4586299
diff --git a/target/linux/mediatek/patches-5.4/0801-mtk-sd-add-mt7986-support.patch b/target/linux/mediatek/patches-5.4/0801-mtk-sd-add-mt7986-support.patch
new file mode 100644
index 0000000..6b76993
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/0801-mtk-sd-add-mt7986-support.patch
@@ -0,0 +1,29 @@
+--- a/drivers/mmc/host/mtk-sd.c
++++ b/drivers/mmc/host/mtk-sd.c
+@@ -508,6 +508,18 @@ static const struct mtk_mmc_compatible m
+ 	.support_64g = false,
+ };
+ 
++static const struct mtk_mmc_compatible mt7986_compat = {
++	.clk_div_bits = 12,
++	.hs400_tune = false,
++	.pad_tune_reg = MSDC_PAD_TUNE0,
++	.async_fifo = true,
++	.data_tune = true,
++	.busy_check = true,
++	.stop_clk_fix = true,
++	.enhance_rx = true,
++	.support_64g = true,
++};
++
+ static const struct mtk_mmc_compatible mt8516_compat = {
+ 	.clk_div_bits = 12,
+ 	.hs400_tune = false,
+@@ -537,6 +549,7 @@ static const struct of_device_id msdc_of
+ 	{ .compatible = "mediatek,mt2701-mmc", .data = &mt2701_compat},
+ 	{ .compatible = "mediatek,mt2712-mmc", .data = &mt2712_compat},
+ 	{ .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat},
++	{ .compatible = "mediatek,mt7986-mmc", .data = &mt7986_compat},
+ 	{ .compatible = "mediatek,mt8516-mmc", .data = &mt8516_compat},
+ 	{ .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat},
+ 	{}