spi: mediatek: add spi support for mt2712 IC

this patch add support for mt2712 IC.
Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-mt65xx.c

@@ -105,6 +105,10 @@ struct mtk_spi {
 
 static const struct mtk_spi_compatible mtk_common_compat;
 
+static const struct mtk_spi_compatible mt2712_compat = {
+	.must_tx = true,
+};
+
 static const struct mtk_spi_compatible mt7622_compat = {
 	.must_tx = true,
 	.enhance_timing = true,
@@ -130,6 +134,9 @@ static const struct of_device_id mtk_spi_of_match[] = {
 	{ .compatible = "mediatek,mt2701-spi",
 		.data = (void *)&mtk_common_compat,
 	},
+	{ .compatible = "mediatek,mt2712-spi",
+		.data = (void *)&mt2712_compat,
+	},
 	{ .compatible = "mediatek,mt6589-spi",
 		.data = (void *)&mtk_common_compat,
 	},