mmc: mediatek: add support for MT7986 SoC

Adding mt7986 own characteristics and of_device_id to have support
of MT7986 SoC.
Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221025132953.81286-7-linux@fw-web.deSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/mtk-sd.c

@@ -552,6 +552,19 @@ static const struct mtk_mmc_compatible mt7622_compat = {
 	.support_64g = false,
 };
 
+static const struct mtk_mmc_compatible mt7986_compat = {
+	.clk_div_bits = 12,
+	.recheck_sdio_irq = true,
+	.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 mt8135_compat = {
 	.clk_div_bits = 8,
 	.recheck_sdio_irq = true,
@@ -609,6 +622,7 @@ static const struct of_device_id msdc_of_ids[] = {
 	{ .compatible = "mediatek,mt6795-mmc", .data = &mt6795_compat},
 	{ .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat},
 	{ .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat},
+	{ .compatible = "mediatek,mt7986-mmc", .data = &mt7986_compat},
 	{ .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
 	{ .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
 	{ .compatible = "mediatek,mt8183-mmc", .data = &mt8183_compat},