ARM: dts: Add sound node for exynos5420-peach-pit board

The audio setup on Peach-pit board is similar to Snow board, hence the
sound-card driver used on Snow board can be reused on Peach-pit board.

Peach-pit board uses MAX98090 audio codec.
Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos5420-peach-pit.dts

@@ -58,9 +58,23 @@ backlight {
 		pinctrl-0 = <&pwm0_out>;
 		pinctrl-names = "default";
 	};
+
+	sound {
+		compatible = "google,snow-audio-max98090";
+
+		samsung,i2s-controller = <&i2s0>;
+		samsung,audio-codec = <&max98090>;
+	};
 };
 
 &pinctrl_0 {
+	max98090_irq: max98090-irq {
+		samsung,pins = "gpx0-2";
+		samsung,pin-function = <0>;
+		samsung,pin-pud = <0>;
+		samsung,pin-drv = <0>;
+	};
+
 	tpm_irq: tpm-irq {
 		samsung,pins = "gpx1-0";
 		samsung,pin-function = <0>;
@@ -130,6 +144,19 @@ slot@0 {
 	};
 };
 
+&hsi2c_7 {
+	status = "okay";
+
+	max98090: codec@10 {
+		compatible = "maxim,max98090";
+		reg = <0x10>;
+		interrupts = <2 0>;
+		interrupt-parent = <&gpx0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&max98090_irq>;
+	};
+};
+
 &hsi2c_9 {
 	status = "okay";
 	clock-frequency = <400000>;
@@ -167,3 +194,7 @@ &hdmi {
 &watchdog {
 	timeout-sec = <32>;
 };
+
+&i2s0 {
+	status = "okay";
+};