sunxi: a10-cubieboard: Add user LEDs to the device tree

Cubieboard has two LEDs available for use, a blue one (labeled LED1)
and a green one (labeled LED2).
Signed-off-by: NEmilio López <emilio@elopez.com.ar>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sun4i-a10-cubieboard.dts

@@ -27,6 +27,15 @@
 	};
 
 	soc {
+		pinctrl@01c20800 {
+			led_pins_cubieboard: led_pins@0 {
+				allwinner,pins = "PH20", "PH21";
+				allwinner,function = "gpio_out";
+				allwinner,drive = <1>;
+				allwinner,pull = <0>;
+			};
+		};
+
 		uart0: uart@01c28000 {
 			status = "okay";
 		};
@@ -35,4 +44,21 @@
 			status = "okay";
 		};
 	};
+
+	leds {
+		compatible = "gpio-leds";
+		pinctrl-names = "default";
+		pinctrl-0 = <&led_pins_cubieboard>;
+
+		blue {
+			label = "cubieboard::blue";
+			gpios = <&pio 7 21 0>; /* LED1 */
+		};
+
+		green {
+			label = "cubieboard::green";
+			gpios = <&pio 7 20 0>; /* LED2 */
+			linux,default-trigger = "heartbeat";
+		};
+	};
 };