sunxi: Sync dts files with upstream kernel

Sync dts files with the current (Aug 18th 2016) state of Maxime's
linux/sunxi/for-next repo.

Note this commit also updates configs/MSI_Primo81_defconfig,
adding: "# CONFIG_REQUIRE_SERIAL_CONSOLE is not set", this is necessary
because the tablet does not have a reachable uart so the dts sync
drops its serial0 alias.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/arch/arm/dts/sun6i-a31.dtsi b/arch/arm/dts/sun6i-a31.dtsi
index 1867af2..b674bf7 100644
--- a/arch/arm/dts/sun6i-a31.dtsi
+++ b/arch/arm/dts/sun6i-a31.dtsi
@@ -469,7 +469,8 @@
 		};
 
 		mmc0: mmc@01c0f000 {
-			compatible = "allwinner,sun5i-a13-mmc";
+			compatible = "allwinner,sun7i-a20-mmc",
+				     "allwinner,sun5i-a13-mmc";
 			reg = <0x01c0f000 0x1000>;
 			clocks = <&ahb1_gates 8>,
 				 <&mmc0_clk 0>,
@@ -488,7 +489,8 @@
 		};
 
 		mmc1: mmc@01c10000 {
-			compatible = "allwinner,sun5i-a13-mmc";
+			compatible = "allwinner,sun7i-a20-mmc",
+				     "allwinner,sun5i-a13-mmc";
 			reg = <0x01c10000 0x1000>;
 			clocks = <&ahb1_gates 9>,
 				 <&mmc1_clk 0>,
@@ -507,7 +509,8 @@
 		};
 
 		mmc2: mmc@01c11000 {
-			compatible = "allwinner,sun5i-a13-mmc";
+			compatible = "allwinner,sun7i-a20-mmc",
+				     "allwinner,sun5i-a13-mmc";
 			reg = <0x01c11000 0x1000>;
 			clocks = <&ahb1_gates 10>,
 				 <&mmc2_clk 0>,
@@ -526,7 +529,8 @@
 		};
 
 		mmc3: mmc@01c12000 {
-			compatible = "allwinner,sun5i-a13-mmc";
+			compatible = "allwinner,sun7i-a20-mmc",
+				     "allwinner,sun5i-a13-mmc";
 			reg = <0x01c12000 0x1000>;
 			clocks = <&ahb1_gates 11>,
 				 <&mmc3_clk 0>,