ARM: dts: imx6qdl-nitrogen6_max: use hyphens for nodes name

Therefore aligning the panel nodes name across all platforms.
Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6qdl-nitrogen6_max.dtsi

@@ -229,7 +229,7 @@ ttymxc4-rs232 {
 		};
 	};
 
-	backlight_lcd: backlight_lcd {
+	backlight_lcd: backlight-lcd {
 		compatible = "pwm-backlight";
 		pwms = <&pwm1 0 5000000>;
 		brightness-levels = <0 4 8 16 32 64 128 255>;
@@ -238,7 +238,7 @@ backlight_lcd: backlight_lcd {
 		status = "okay";
 	};
 
-	backlight_lvds0: backlight_lvds0 {
+	backlight_lvds0: backlight-lvds0 {
 		compatible = "pwm-backlight";
 		pwms = <&pwm4 0 5000000>;
 		brightness-levels = <0 4 8 16 32 64 128 255>;
@@ -247,7 +247,7 @@ backlight_lvds0: backlight_lvds0 {
 		status = "okay";
 	};
 
-	backlight_lvds1: backlight_lvds1 {
+	backlight_lvds1: backlight-lvds1 {
 		compatible = "pwm-backlight";
 		pwms = <&pwm2 0 5000000>;
 		brightness-levels = <0 4 8 16 32 64 128 255>;
@@ -282,7 +282,7 @@ lcd_display_out: endpoint {
 		};
 	};
 
-	panel_lcd {
+	panel-lcd {
 		compatible = "okaya,rs800480t-7x0gp";
 		backlight = <&backlight_lcd>;
 
@@ -293,7 +293,7 @@ lcd_panel_in: endpoint {
 		};
 	};
 
-	panel_lvds0 {
+	panel-lvds0 {
 		compatible = "hannstar,hsd100pxn1";
 		backlight = <&backlight_lvds0>;
 
@@ -304,7 +304,7 @@ panel_in_lvds0: endpoint {
 		};
 	};
 
-	panel_lvds1 {
+	panel-lvds1 {
 		compatible = "hannstar,hsd100pxn1";
 		backlight = <&backlight_lvds1>;
 
@@ -447,7 +447,7 @@ touchscreen@38 {
 };
 
 &iomuxc {
-	imx6q-nitrogen6_max {
+	imx6q-nitrogen6-max {
 		pinctrl_audmux: audmuxgrp {
 			fsl,pins = <
 				MX6QDL_PAD_CSI0_DAT7__AUD3_RXD		0x130b0
@@ -504,7 +504,7 @@ MX6QDL_PAD_GPIO_6__ENET_IRQ		0x000b1
 			>;
 		};
 
-		pinctrl_gpio_keys: gpio_keysgrp {
+		pinctrl_gpio_keys: gpio-keysgrp {
 			fsl,pins = <
 				/* Power Button */
 				MX6QDL_PAD_NANDF_D3__GPIO2_IO03		0x1b0b0
@@ -720,7 +720,7 @@ MX6QDL_PAD_SD4_DAT7__SD4_DATA7		0x17059
 			>;
 		};
 
-		pinctrl_wlan_vmmc: wlan_vmmcgrp {
+		pinctrl_wlan_vmmc: wlan-vmmcgrp {
 			fsl,pins = <
 				MX6QDL_PAD_NANDF_CS0__GPIO6_IO11	0x100b0
 				MX6QDL_PAD_NANDF_CS2__GPIO6_IO15	0x000b0