ARM: dts: sun4i: Fix gpio-keys warning

Fix the 'unnecessary #address-cells/#size-cells without "ranges" or child
"reg" property' DTC warning for the gpio-keys DT node on A10 boards.
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>

arch/arm/boot/dts/sun4i-a10-inet9f-rev03.dts

@@ -63,8 +63,6 @@ gpio-keys {
 		compatible = "gpio-keys-polled";
 		pinctrl-names = "default";
 		pinctrl-0 = <&key_pins_inet9f>;
-		#address-cells = <1>;
-		#size-cells = <0>;
 		poll-interval = <20>;
 
 		left-joystick-left {

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

@@ -76,8 +76,6 @@ rx {
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 
 		back {
 			label = "Key Back";