ARM: dts: exynos: add function and color to LED nodes in Odroid XU/XU3

Add common LED properties - the function and color - to LED nodes in
Exynos5422 Odroid XU/XU3/XU3-Lite, so we can drop in some places
deprecated label property.

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

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

···
  */
 
 #include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/leds/common.h>
 
 / {
 	led-controller-1 {
···
 
 		led-1 {
 			label = "green:mmc0";
+			function = LED_FUNCTION_DISK_ACTIVITY;
+			color = <LED_COLOR_ID_GREEN>;
 			pwms = <&pwm 1 2000000 0>;
 			pwm-names = "pwm1";
 			/*
···
 		};
 
 		led-2 {
-			label = "blue:heartbeat";
+			function = LED_FUNCTION_HEARTBEAT;
+			color = <LED_COLOR_ID_BLUE>;
 			pwms = <&pwm 2 2000000 0>;
 			pwm-names = "pwm2";
 			max-brightness = <255>;
···
 
 		led-3 {
 			label = "red:microSD";
+			function = LED_FUNCTION_DISK_ACTIVITY;
+			color = <LED_COLOR_ID_RED>;
 			gpios = <&gpx2 3 GPIO_ACTIVE_HIGH>;
 			default-state = "off";
 			linux,default-trigger = "mmc1";