ARM: at91/dt: sama5d4ek: add leds in DT node

Add the leds DT node in the dts file.
In the leds, d10 is set as heartbeat led.
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>

arch/arm/boot/dts/at91-sama5d4ek.dts

@@ -255,4 +255,26 @@ pb_user1 {
 			gpio-key,wakeup;
 		};
 	};
+
+	leds {
+		compatible = "gpio-leds";
+		status = "okay";
+
+		d8 {
+			label = "d8";
+			/* PE28, conflicts with usart4 rts pin */
+			gpios = <&pioE 28 GPIO_ACTIVE_LOW>;
+		};
+
+		d9 {
+			label = "d9";
+			gpios = <&pioE 9 GPIO_ACTIVE_HIGH>;
+		};
+
+		d10 {
+			label = "d10";
+			gpios = <&pioE 8 GPIO_ACTIVE_LOW>;
+			linux,default-trigger = "heartbeat";
+		};
+	};
 };