ARM: dts: AM33XX: Add user-leds device tree data to am335x-bone

Add gpio-leds device tree data to am335x-bone device to enable gpio
based user-leds (USR0, USR1, USR2 and USR3) present on BeagleBone.

[koen@dominion.thruhere.net: led0, led1 suggested by koen]
Signed-off-by: AnilKumar Ch <anilkumar@ti.com>
Signed-off-by: Benoit Cousson <b-cousson@ti.com>

arch/arm/boot/dts/am335x-bone.dts

@@ -53,6 +53,36 @@
 
 		};
 	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		led@2 {
+			label = "beaglebone:green:heartbeat";
+			gpios = <&gpio2 21 0>;
+			linux,default-trigger = "heartbeat";
+			default-state = "off";
+		};
+
+		led@3 {
+			label = "beaglebone:green:mmc0";
+			gpios = <&gpio2 22 0>;
+			linux,default-trigger = "mmc0";
+			default-state = "off";
+		};
+
+		led@4 {
+			label = "beaglebone:green:usr2";
+			gpios = <&gpio2 23 0>;
+			default-state = "off";
+		};
+
+		led@5 {
+			label = "beaglebone:green:usr3";
+			gpios = <&gpio2 24 0>;
+			default-state = "off";
+		};
+	};
 };
 
 /include/ "tps65217.dtsi"