ARM: dts: Add Exynos5250 Snow Rev5+ support on exynos5250-snow-rev5

There are 2 revisions of the Exynos5250 Snow Chromebook that were
shipped: Rev4 and Rev5. The only difference between these 2 revisions
is the codec, Rev4 has a max98095 codec while Rev5 has a max98090.

Mainline only supports Rev4 so this patch moves the common device
nodes to a DTSI file and adds a DTS for the Exynos5250 Snow Rev5.

The Snow Rev5 DTS is based on the DTS found in the ChromiumOS 3.8
tree.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Tested-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Kukjin Kim <kgene@kernel.org>

arch/arm/boot/dts/Makefile

@@ -115,6 +115,7 @@ dtb-$(CONFIG_ARCH_EXYNOS5) += \
 	exynos5250-arndale.dtb \
 	exynos5250-smdk5250.dtb \
 	exynos5250-snow.dtb \
+	exynos5250-snow-rev5.dtb \
 	exynos5250-spring.dtb \
 	exynos5260-xyref5260.dtb \
 	exynos5410-smdk5410.dtb \

arch/arm/boot/dts/exynos5250-snow-rev5.dts

+/*
+ * Google Snow Rev 5+ board device tree source
+ *
+ * Copyright (c) 2012 Google, Inc
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ *             http://www.samsung.com
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/dts-v1/;
+#include "exynos5250-snow-common.dtsi"
+
+/ {
+	model = "Google Snow Rev 5+";
+	compatible = "google,snow-rev5", "samsung,exynos5250",
+		"samsung,exynos5";
+
+	sound {
+		compatible = "google,snow-audio-max98090";
+
+		samsung,model = "Snow-I2S-MAX98090";
+		samsung,audio-codec = <&max98090>;
+	};
+};
+
+&i2c_7 {
+	max98090: codec@10 {
+		compatible = "maxim,max98090";
+		reg = <0x10>;
+		interrupts = <4 IRQ_TYPE_NONE>;
+		interrupt-parent = <&gpx0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&max98090_irq>;
+	};
+};
+
+&pinctrl_0 {
+	max98090_irq: max98090-irq {
+		samsung,pins = "gpx0-4";
+		samsung,pin-function = <0>;
+		samsung,pin-pud = <0>;
+		samsung,pin-drv = <0>;
+	};
+};