ARM: dtsi: imx6qdl-sabresd: Enable SSI2 and AUDMUX

Enable SSI2 and its pin configuration in AUDMUX.
Signed-off-by: NNicolin Chen <b42378@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

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

@@ -52,6 +52,12 @@
 	};
 };
 
+&audmux {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_audmux_2>;
+	status = "okay";
+};
+
 &fec {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_enet_1>;
@@ -88,6 +94,11 @@
        };
 };
 
+&ssi2 {
+	fsl,mode = "i2s-slave";
+	status = "okay";
+};
+
 &uart1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_uart1_1>;