ARM: dts: sun6i: Add SPDIF to the Mele I7

Enable the S/PDIF transmitter that is present on the Mele I7.
Signed-off-by: Marcus Cooper <codekipper@gmail.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun6i-a31-i7.dts

@@ -69,6 +69,23 @@ blue {
 			gpios = <&pio 7 13 GPIO_ACTIVE_HIGH>;
 		};
 	};
+
+	sound {
+		compatible = "simple-audio-card";
+		simple-audio-card,name = "On-board SPDIF";
+		simple-audio-card,cpu {
+			sound-dai = <&spdif>;
+		};
+
+		simple-audio-card,codec {
+			sound-dai = <&spdif_out>;
+		};
+	};
+
+	spdif_out: spdif-out {
+		#sound-dai-cells = <0>;
+		compatible = "linux,spdif-dit";
+	};
 };
 
 &codec {
@@ -138,6 +155,13 @@ &reg_usb1_vbus {
 	status = "okay";
 };
 
+&spdif {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spdif_pins_a>;
+	spdif-out = "okay";
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins_a>;