arm64: dts: freescale: imx8mp-toradex-smarc: fix lvds dsi mux gpio

The MUX which either outputs DSI or 2nd channel LVDS signals is part of
the SoM. Move the pinmuxing of the GPIO used for controlling the MUX
to the SoM dtsi file.

Fixes: 97dc91c ("arm64: dts: freescale: add Toradex SMARC iMX8MP")
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: MaxKrummenacher

arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc-dev.dts

@@ -102,11 +102,6 @@
 		    <&pinctrl_gpio13>;
 };
 
-&gpio3 {
-	pinctrl-names = "default";
-	pinctrl-0 = <&pinctrl_lvds_dsi_sel>;
-};
-
 &gpio4 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_gpio4>, <&pinctrl_gpio6>;

arch/arm64/boot/dts/freescale/imx8mp-toradex-smarc.dtsi

@@ -320,6 +320,8 @@
 };
 
 &gpio3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_lvds_dsi_sel>;
 	gpio-line-names = "ETH_0_INT#", /* 0 */
 			  "SLEEP#",
 			  "",