ARM: dts: zynq: Remove #address/#size-cells from gpio-keys

dts reports incorrect usage of these properties in gpio-keys node.
Warning (avoid_unnecessary_addr_size): /gpio-keys: unnecessary

The patch is removing these useless properties.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/boot/dts/zynq-zc702.dts

@@ -29,8 +29,6 @@ chosen {
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 		autorepeat;
 		sw14 {
 			label = "sw14";

arch/arm/boot/dts/zynq-zturn.dts

@@ -49,8 +49,6 @@ usr-led2 {
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 		autorepeat;
 		K1 {
 			label = "K1";