ARM: dts: imx53-tx53: add support for I2C bus recovery

The imx-i2c driver supports automatic bus recovery via the GPIO
function of the I2C pins. Enable this functionality for the Ka-Ro
electronics TX53 modules.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx53-tx53-x13x.dts

@@ -121,8 +121,11 @@ reg_lcd_pwr1: regulator-lvds1-pwr {
 };
 
 &i2c3 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c3>;
+	pinctrl-1 = <&pinctrl_i2c3_gpio>;
+	scl-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
+	sda-gpios = <&gpio3 28 GPIO_ACTIVE_HIGH>;
 	status = "okay";
 
 	sgtl5000: codec@0a {

arch/arm/boot/dts/imx53-tx53.dtsi

@@ -233,8 +233,11 @@ phy0: ethernet-phy@0 {
 };
 
 &i2c1 {
-	pinctrl-names = "default";
+	pinctrl-names = "default", "gpio";
 	pinctrl-0 = <&pinctrl_i2c1>;
+	pinctrl-0 = <&pinctrl_i2c1_gpio>;
+	scl-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
+	sda-gpios = <&gpio3 28 GPIO_ACTIVE_HIGH>;
 	clock-frequency = <400000>;
 	status = "okay";
 
@@ -394,6 +397,13 @@ MX53_PAD_EIM_D28__I2C1_SDA		0x400001e4
 			>;
 		};
 
+		pinctrl_i2c1_gpio: i2c1-gpiogrp {
+			fsl,pins = <
+				MX53_PAD_EIM_D21__GPIO3_21		0x400001e6
+				MX53_PAD_EIM_D28__GPIO3_28		0x400001e6
+			>;
+		};
+
 		pinctrl_i2c3: i2c3grp {
 			fsl,pins = <
 				MX53_PAD_GPIO_3__I2C3_SCL		0x400001e4
@@ -401,6 +411,13 @@ MX53_PAD_GPIO_6__I2C3_SDA		0x400001e4
 			>;
 		};
 
+		pinctrl_i2c3_gpio: i2c3-gpiogrp {
+			fsl,pins = <
+				MX53_PAD_GPIO_3__GPIO1_3		0x400001e6
+				MX53_PAD_GPIO_6__GPIO1_6		0x400001e6
+			>;
+		};
+
 		pinctrl_nand: nandgrp {
 			fsl,pins = <
 				MX53_PAD_NANDF_WE_B__EMI_NANDF_WE_B	0x4