mmc: sunxi: Add DM_MMC support for A80

A80 gates clock already be part of CLK framework, so just
add mod_clk offset with A80 compatible string.

Cc: Rask Ingemann Lambertsen <rask@formelder.dk>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/drivers/mmc/sunxi_mmc.c b/drivers/mmc/sunxi_mmc.c
index 1e13a06..0c443a7 100644
--- a/drivers/mmc/sunxi_mmc.c
+++ b/drivers/mmc/sunxi_mmc.c
@@ -680,6 +680,10 @@
 	.mclk_offset = 0x88,
 };
 
+static const struct sunxi_mmc_variant sun9i_a80_variant = {
+	.mclk_offset = 0x410,
+};
+
 static const struct sunxi_mmc_variant sun50i_h6_variant = {
 	.mclk_offset = 0x830,
 };
@@ -702,6 +706,10 @@
 	  .data = (ulong)&sun4i_a10_variant,
 	},
 	{
+	  .compatible = "allwinner,sun9i-a80-mmc",
+	  .data = (ulong)&sun9i_a80_variant,
+	},
+	{
 	  .compatible = "allwinner,sun50i-a64-mmc",
 	  .data = (ulong)&sun4i_a10_variant,
 	},