ARM: dts: imx6-tx6: remove LED pinctrl setting from hoggrp

Move the pinctrl setting for the board LED from the hoggrp node
to a separate node referenced by the LED driver, so that the pin is
free to be used for different purpose when the LED driver is disabled.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

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

@@ -92,6 +92,8 @@ leds {
 
 		user_led: user {
 			label = "Heartbeat";
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_user_led>;
 			gpios = <&gpio2 20 GPIO_ACTIVE_HIGH>;
 			linux,default-trigger = "heartbeat";
 		};
@@ -332,7 +334,6 @@ &iomuxc {
 
 	pinctrl_hog: hoggrp {
 		fsl,pins = <
-			MX6QDL_PAD_EIM_A18__GPIO2_IO20		0x1b0b1 /* LED */
 			MX6QDL_PAD_SD3_DAT2__GPIO7_IO06		0x1b0b1 /* ETN PHY RESET */
 			MX6QDL_PAD_SD3_DAT4__GPIO7_IO01		0x1b0b1 /* ETN PHY INT */
 			MX6QDL_PAD_EIM_A25__GPIO5_IO02		0x1b0b1 /* PWR BTN */
@@ -638,6 +639,12 @@ MX6QDL_PAD_SD2_DAT3__SD2_DATA3		0x070b1
 			MX6QDL_PAD_SD3_CLK__GPIO7_IO03		0x170b0 /* SD2 CD */
 		>;
 	};
+
+	pinctrl_user_led: user-ledgrp {
+		fsl,pins = <
+			MX6QDL_PAD_EIM_A18__GPIO2_IO20		0x1b0b1 /* LED */
+		>;
+	};
 };
 
 &kpp {