ARM: dts: imx6-tx6: add support for I2C bus recovery

Define the required properties to enable I2C bus recovery supported by
the I2C subsystem.

Signed-off-by: Lothar Waßmann <[e-mail]>
Signed-off-by: Shawn Guo <[e-mail]>

arch/arm/boot/dts/imx6qdl-tx6.dtsi

···
 };
 
 &i2c1 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c1>;
+	pinctrl-1 = <&pinctrl_i2c1_gpio>;
+	scl-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
+	sda-gpios = <&gpio3 28 GPIO_ACTIVE_HIGH>;
 	clock-frequency = <400000>;
 	status = "okay";
 
···
 };
 
 &i2c3 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c3>;
+	pinctrl-1 = <&pinctrl_i2c3_gpio>;
+	scl-gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
+	sda-gpios = <&gpio1 6 GPIO_ACTIVE_HIGH>;
 	clock-frequency = <400000>;
 	status = "okay";
 
···
 		>;
 	};
 
+	pinctrl_i2c1_gpio: i2c1-gpiogrp {
+		fsl,pins = <
+			MX6QDL_PAD_EIM_D21__GPIO3_IO21		0x4001b8b1
+			MX6QDL_PAD_EIM_D28__GPIO3_IO28		0x4001b8b1
+		>;
+	};
+
 	pinctrl_i2c3: i2c3grp {
 		fsl,pins = <
 			MX6QDL_PAD_GPIO_3__I2C3_SCL		0x4001b8b1
 			MX6QDL_PAD_GPIO_6__I2C3_SDA		0x4001b8b1
+		>;
+	};
+
+	pinctrl_i2c3_gpio: i2c3-gpiogrp {
+		fsl,pins = <
+			MX6QDL_PAD_GPIO_3__GPIO1_IO03		0x4001b8b1
+			MX6QDL_PAD_GPIO_6__GPIO1_IO06		0x4001b8b1
 		>;
 	};