ARM: dts: exynos: add function and color to LED node in Odroid U3

Add common LED properties - the function and color - to LED node in
Exynos4412 Odroid U3, so we can drop deprecated label property.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220620175716.132143-5-krzysztof.kozlowski@linaro.org

arch/arm/boot/dts/exynos4412-odroidu3.dts

@@ -9,6 +9,7 @@
  */
 
 /dts-v1/;
+#include <dt-bindings/leds/common.h>
 #include "exynos4412-odroid-common.dtsi"
 #include "exynos4412-prime.dtsi"
 
@@ -37,7 +38,8 @@ vbus_otg_reg: regulator-1 {
 	leds {
 		compatible = "gpio-leds";
 		led1 {
-			label = "led1:heart";
+			function = LED_FUNCTION_HEARTBEAT;
+			color = <LED_COLOR_ID_BLUE>;
 			gpios = <&gpc1 0 GPIO_ACTIVE_LOW>;
 			default-state = "on";
 			linux,default-trigger = "heartbeat";