ARM: dts: exynos: add function and color to LED nodes in Itop Elite

Add common LED properties - the function and color - to LED nodes in
Exynos4412 Itop Elite, so we can drop in some places deprecated label
property.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220620175716.132143-4-krzysztof.kozlowski@linaro.org

arch/arm/boot/dts/exynos4412-itop-elite.dts

@@ -11,6 +11,7 @@
  */
 
 /dts-v1/;
+#include <dt-bindings/leds/common.h>
 #include <dt-bindings/pwm/pwm.h>
 #include <dt-bindings/sound/samsung-i2s.h>
 #include "exynos4412-itop-scp-core.dtsi"
@@ -28,7 +29,8 @@ leds {
 		compatible = "gpio-leds";
 
 		led2 {
-			label = "red:system";
+			function = LED_FUNCTION_HEARTBEAT;
+			color = <LED_COLOR_ID_RED>;
 			gpios = <&gpx1 0 GPIO_ACTIVE_HIGH>;
 			default-state = "off";
 			linux,default-trigger = "heartbeat";
@@ -36,6 +38,7 @@ led2 {
 
 		led3 {
 			label = "red:user";
+			color = <LED_COLOR_ID_RED>;
 			gpios = <&gpk1 1 GPIO_ACTIVE_HIGH>;
 			default-state = "off";
 		};