ARM: dts: rockchip: Remove #address/#size-cells from rk3288-veyron gpio-keys

They are pointless.  As dtc points out:
  Warning (avoid_unnecessary_addr_size):
  /gpio-keys:
  unnecessary #address-cells/#size-cells without "ranges" or child "reg" property

Let's remove them.
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3288-veyron.dtsi

@@ -25,8 +25,6 @@ memory {
 
 	gpio_keys: gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 
 		pinctrl-names = "default";
 		pinctrl-0 = <&pwr_key_l>;