ARM: dts: vf610: align LED node names with dtschema

The node names should be generic and DT schema expects certain pattern.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/vf610-bk4.dts

@@ -38,7 +38,7 @@ leds {
 		pinctrl-0 = <&pinctrl_gpio_leds>;
 
 		/* LED D5 */
-		led0: heartbeat {
+		led0: led-heartbeat {
 			label = "heartbeat";
 			gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
 			default-state = "on";

arch/arm/boot/dts/vf610-zii-dev.dtsi

@@ -59,7 +59,7 @@ gpio-leds {
 		pinctrl-0 = <&pinctrl_leds_debug>;
 		pinctrl-names = "default";
 
-		debug {
+		led-debug {
 			label = "zii:green:debug1";
 			gpios = <&gpio2 10 GPIO_ACTIVE_HIGH>;
 			linux,default-trigger = "heartbeat";

arch/arm/boot/dts/vf610-zii-scu4-aib.dts

@@ -23,7 +23,7 @@ gpio-leds {
 		pinctrl-0 = <&pinctrl_leds_debug>;
 		pinctrl-names = "default";
 
-		debug {
+		led-debug {
 			label = "zii:green:debug1";
 			gpios = <&gpio3 0 GPIO_ACTIVE_HIGH>;
 			linux,default-trigger = "heartbeat";