arm64: dts: colibri-imx8x: Split pinctrl_hog1

Split pinctrl_hog1 into a second group so CSI_MCLK can be muxed to a
gpio on its own.
Signed-off-by: Philippe Schenker <philippe.schenker@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/imx8x-colibri.dtsi

@@ -119,7 +119,8 @@ &usdhc2 {
 
 &iomuxc {
 	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_ext_io0>, <&pinctrl_hog0>, <&pinctrl_hog1>;
+	pinctrl-0 = <&pinctrl_ext_io0>, <&pinctrl_hog0>, <&pinctrl_hog1>,
+		    <&pinctrl_hog2>;
 
 	/* On-module touch pen-down interrupt */
 	pinctrl_ad7879_int: ad7879intgrp {
@@ -253,6 +254,10 @@ pinctrl_hog1: hog1grp {
 			   <IMX8QXP_QSPI0A_SCLK_LSIO_GPIO3_IO16			0x20>;		/* SODIMM  93 */
 	};
 
+	pinctrl_hog2: hog2grp {
+		fsl,pins = <IMX8QXP_CSI_MCLK_LSIO_GPIO3_IO01			0x20>;		/* SODIMM  75 */
+	};
+
 	/*
 	 * This pin is used in the SCFW as a UART. Using it from
 	 * Linux would require rewritting the SCFW board file.