ARM: dts: Add AK8975 device node for Exynos4412 TRATS2 board

This patch adds AK8975 magnetometer node and corresponding
i2c-gpio bus node for TRATS2 board.
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos4412-trats2.dts

@@ -19,6 +19,10 @@ / {
 	model = "Samsung Trats 2 based on Exynos4412";
 	compatible = "samsung,trats2", "samsung,exynos4412";
 
+	aliases {
+		i2c8 = &i2c_ak8975;
+	};
+
 	memory {
 		reg =  <0x40000000 0x40000000>;
 	};
@@ -453,4 +457,19 @@ serial@13820000 {
 	serial@13830000 {
 		status = "okay";
 	};
+
+	i2c_ak8975: i2c-gpio-0 {
+		compatible = "i2c-gpio";
+		gpios = <&gpy2 4 0>, <&gpy2 5 0>;
+		i2c-gpio,delay-us = <2>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "okay";
+
+		ak8975@0c {
+			compatible = "ak,ak8975";
+			reg = <0x0c>;
+			gpios = <&gpj0 7 0>;
+		};
+	};
 };