arm64: dts: rockchip: fix pinctrl-names for gpio-leds node on rk3326-odroid-go2

The 'pinctrl-names' property should contain a list of names
to the assigned states. The value 'led_pins' in the gpio-leds
node on rk3326-odroid-go2 is not a state that is normally used,
so change it the common name 'default'.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20200519111444.2208-1-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts

@@ -127,7 +127,7 @@ sw16 {
 
 	leds: gpio-leds {
 		compatible = "gpio-leds";
-		pinctrl-names = "led_pins";
+		pinctrl-names = "default";
 		pinctrl-0 = <&blue_led_pin>;
 
 		blue_led: led-0 {