ARM: dts: sun6i: Add mmc2 pins for 8 bit emmc

This also includes the reset pin for emmc.

Signed-off-by: Chen-Yu Tsai <[e-mail]>
Signed-off-by: Maxime Ripard <[e-mail]>

arch/arm/boot/dts/sun6i-a31.dtsi

···
 				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
 			};
 
+			mmc2_8bit_emmc_pins: mmc2@0 {
+				allwinner,pins = "PC6", "PC7", "PC8", "PC9",
+						 "PC10", "PC11", "PC12",
+						 "PC13", "PC14", "PC15",
+						 "PC24";
+				allwinner,function = "mmc2";
+				allwinner,drive = <SUN4I_PINCTRL_30_MA>;
+				allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
+			};
+
 			gmac_pins_mii_a: gmac_mii@0 {
 				allwinner,pins = "PA0", "PA1", "PA2", "PA3",
 						"PA8", "PA9", "PA11",