ARM: dts: exynos: add function to LED node in Origen 4210

Add common LED property - the function - to LED node in Origen 4210.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220620175716.132143-2-krzysztof.kozlowski@linaro.org

arch/arm/boot/dts/exynos4210-origen.dts

@@ -15,6 +15,7 @@
 #include "exynos4210.dtsi"
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/input/input.h>
+#include <dt-bindings/leds/common.h>
 #include "exynos-mfc-reserved-memory.dtsi"
 
 / {
@@ -86,6 +87,7 @@ leds {
 		compatible = "gpio-leds";
 		status {
 			gpios = <&gpx1 3 GPIO_ACTIVE_LOW>;
+			function = LED_FUNCTION_HEARTBEAT;
 			linux,default-trigger = "heartbeat";
 		};
 	};