arm64: dts: hikey960: add LED nodes

HiKey960 has four user LEDs, and two special purpose LEDs: WiFi and BT
respectively.

All of them are implemented as GPIO.
Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/boot/dts/hisilicon/hi3660-hikey960.dts

@@ -49,6 +49,54 @@ power {
 			linux,code = <KEY_POWER>;
 		};
 	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		user_led1 {
+			label = "user_led1";
+			/* gpio_150_user_led1 */
+			gpios = <&gpio18 6 0>;
+			linux,default-trigger = "heartbeat";
+		};
+
+		user_led2 {
+			label = "user_led2";
+			/* gpio_151_user_led2 */
+			gpios = <&gpio18 7 0>;
+			linux,default-trigger = "mmc0";
+		};
+
+		user_led3 {
+			label = "user_led3";
+			/* gpio_189_user_led3 */
+			gpios = <&gpio23 5 0>;
+			default-state = "off";
+		};
+
+		user_led4 {
+			label = "user_led4";
+			/* gpio_190_user_led4 */
+			gpios = <&gpio23 6 0>;
+			linux,default-trigger = "cpu0";
+		};
+
+		wlan_active_led {
+			label = "wifi_active";
+			/* gpio_205_wifi_active */
+			gpios = <&gpio25 5 0>;
+			linux,default-trigger = "phy0tx";
+			default-state = "off";
+		};
+
+		bt_active_led {
+			label = "bt_active";
+			gpios = <&gpio25 7 0>;
+			/* gpio_207_user_led1 */
+			linux,default-trigger = "hci0-power";
+			default-state = "off";
+		};
+	};
 };
 
 &i2c0 {