imx: dts: mx6sxsabreauto: enable i2c2/3

Enable i2c2/3, add pinctrl settings.
Add max7310 for i2c3.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Cc: Stefano Babic <sbabic@denx.de>
diff --git a/arch/arm/dts/imx6sx-sabreauto.dts b/arch/arm/dts/imx6sx-sabreauto.dts
index 240a286..a4c2627 100644
--- a/arch/arm/dts/imx6sx-sabreauto.dts
+++ b/arch/arm/dts/imx6sx-sabreauto.dts
@@ -68,8 +68,50 @@
 	status = "okay";
 };
 
+&i2c2 {
+	clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c2_1>;
+	status = "okay";
+};
+
+&i2c3 {
+        clock-frequency = <100000>;
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_i2c3_2>;
+	status = "okay";
+
+	max7310_a: gpio@30 {
+		compatible = "maxim,max7310";
+		reg = <0x30>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+
+	max7310_b: gpio@32 {
+		compatible = "maxim,max7310";
+		reg = <0x32>;
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
+};
+
 &iomuxc {
 	imx6x-sabreauto {
+		pinctrl_i2c2_1: i2c2grp-1 {
+			fsl,pins = <
+				MX6SX_PAD_GPIO1_IO03__I2C2_SDA          0x4001b8b1
+				MX6SX_PAD_GPIO1_IO02__I2C2_SCL          0x4001b8b1
+			>;
+		};
+
+		pinctrl_i2c3_2: i2c3grp-2 {
+			fsl,pins = <
+				MX6SX_PAD_KEY_ROW4__I2C3_SDA            0x4001b8b1
+				MX6SX_PAD_KEY_COL4__I2C3_SCL            0x4001b8b1
+			>;
+		};
+
 		pinctrl_uart1: uart1grp {
 			fsl,pins = <
 				MX6SX_PAD_GPIO1_IO04__UART1_TX		0x1b0b1