ARM: dts: imx6qdl: add spdif support for sabreauto

This patch adds spdif support for imx6qdl-sabreauto by inserting the cpu dai
node with pinctrl group and its ASoC dai link node.
Signed-off-by: NNicolin Chen <Guangyu.Chen@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6qdl-sabreauto.dtsi

@@ -14,6 +14,14 @@
 	memory {
 		reg = <0x10000000 0x80000000>;
 	};
+
+	sound-spdif {
+		compatible = "fsl,imx-audio-spdif",
+			   "fsl,imx-sabreauto-spdif";
+		model = "imx-spdif";
+		spdif-controller = <&spdif>;
+		spdif-in;
+	};
 };
 
 &ecspi1 {
@@ -114,6 +122,12 @@
 			>;
 		};
 
+		pinctrl_spdif: spdifgrp {
+			fsl,pins = <
+				MX6QDL_PAD_KEY_COL3__SPDIF_IN 0x1b0b0
+			>;
+		};
+
 		pinctrl_uart4: uart4grp {
 			fsl,pins = <
 				MX6QDL_PAD_KEY_COL0__UART4_TX_DATA	0x1b0b1
@@ -222,6 +236,12 @@
 	};
 };
 
+&spdif {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_spdif>;
+	status = "okay";
+};
+
 &uart4 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart4>;