ARMv8 Juno DT fix for v4.17

A single patch to fix the new DTC warnings probably enabled during
 v4.17 merge window.
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Merge tag 'juno-fixes-4.17' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux into fixes

Pull "ARMv8 Juno DT fix for v4.17" from Sudeep Holla:

A single patch to fix the new DTC warnings probably enabled during
v4.17 merge window.

* tag 'juno-fixes-4.17' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux:
  arm64: dts: juno: drop unnecessary address-cells and size-cells properties

arch/arm64/boot/dts/arm/juno-motherboard.dtsi

@@ -56,8 +56,6 @@
 
 			gpio_keys {
 				compatible = "gpio-keys";
-				#address-cells = <1>;
-				#size-cells = <0>;
 
 				power-button {
 					debounce_interval = <50>;