ARM: dts: exynos: Fix schema warnings for pwm-leds

The node names for devices using the pwm-leds driver follow a certain
naming scheme (now). Parent node name is not enforced, but recommended
by DT project.

arch/arm/boot/dts/exynos5410-odroidxu.dt.yaml: pwmleds:
'blueled', 'greenled' do not match any of the regexes: '^led(-[0-9a-f]+)?$', 'pinctrl-[0-9]+'
arch/arm/boot/dts/exynos5422-odroidhc1.dt.yaml: pwmleds:
'blueled' does not match any of the regexes: '^led(-[0-9a-f]+)?$', 'pinctrl-[0-9]+'
From schema: Documentation/devicetree/bindings/leds/leds-pwm.yaml

Signed-off-by: Alexander Dahl <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Krzysztof Kozlowski <[e-mail]>

arch/arm/boot/dts/exynos5422-odroidhc1.dts

···
 	compatible = "hardkernel,odroid-hc1", "samsung,exynos5800", \
 		     "samsung,exynos5";
 
-	pwmleds {
+	led-controller {
 		compatible = "pwm-leds";
 
-		blueled {
+		led-1 {
 			label = "blue:heartbeat";
 			pwms = <&pwm 2 2000000 0>;
 			pwm-names = "pwm2";

arch/arm/boot/dts/exynos5422-odroidxu4.dts

···
 	compatible = "hardkernel,odroid-xu4", "samsung,exynos5800", \
 		     "samsung,exynos5";
 
-	pwmleds {
+	led-controller {
 		compatible = "pwm-leds";
 
-		blueled {
+		led-1 {
 			label = "blue:heartbeat";
 			pwms = <&pwm 2 2000000 0>;
 			pwm-names = "pwm2";

arch/arm/boot/dts/exynos54xx-odroidxu-leds.dtsi

···
 #include <dt-bindings/gpio/gpio.h>
 
 / {
-	pwmleds {
+	led-controller-1 {
 		compatible = "pwm-leds";
 
-		greenled {
+		led-1 {
 			label = "green:mmc0";
 			pwms = <&pwm 1 2000000 0>;
 			pwm-names = "pwm1";
···
 			linux,default-trigger = "mmc0";
 		};
 
-		blueled {
+		led-2 {
 			label = "blue:heartbeat";
 			pwms = <&pwm 2 2000000 0>;
 			pwm-names = "pwm2";
···
 		};
 	};
 
-	gpioleds {
+	led-controller-2 {
 		compatible = "gpio-leds";
-		redled {
+
+		led-3 {
 			label = "red:microSD";
 			gpios = <&gpx2 3 GPIO_ACTIVE_HIGH>;
 			default-state = "off";