ARM: dts: imx: e60k02: correct led node name

Only led-X or led are allowed according to bindings definition.
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/e60k02.dtsi

@@ -41,7 +41,7 @@ cover {
 	leds: leds {
 		compatible = "gpio-leds";
 
-		on {
+		led {
 			label = "e60k02:white:on";
 			gpios = <&gpio5 7 GPIO_ACTIVE_LOW>;
 			linux,default-trigger = "timer";