ARM: dts: sun5i: Add mmc2 pinmux settings

Add A13 mmc2 pinmux settings, note these are for a 8bit bus.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun5i.dtsi

@@ -469,6 +469,15 @@ mmc0_pins_a: mmc0@0 {
 				allwinner,drive = <SUN4I_PINCTRL_30_MA>;
 				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
 			};
+
+			mmc2_pins_a: mmc2@0 {
+				allwinner,pins = "PC6", "PC7", "PC8", "PC9",
+					"PC10", "PC11", "PC12", "PC13",
+					"PC14", "PC15";
+				allwinner,function = "mmc2";
+				allwinner,drive = <SUN4I_PINCTRL_30_MA>;
+				allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
+			};
 		};
 
 		timer@01c20c00 {