Quoting from Documentation/leds/leds-class.txt:
    LED Device Naming
    =================
    Is currently of the form:
    "devicename:colour:function"
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
                pinctrl-0 = <&led_pins_cubieboard>;
 
                blue {
-                       label = "cubieboard::blue";
+                       label = "cubieboard:blue:usr";
                        gpios = <&pio 7 21 0>; /* LED1 */
                };
 
                green {
-                       label = "cubieboard::green";
+                       label = "cubieboard:green:usr";
                        gpios = <&pio 7 20 0>; /* LED2 */
                        linux,default-trigger = "heartbeat";
                };