arm: zynq: Drop #address-cells and #size-cells from gpio-keys

dtc is showing some warnings and this change was also done in
the Linux kernel as "Input: gpio-keys - clean up device tree binding
example"
with this fragment in commit message
"Drop #address-cells and #size-cells, which are not required by the
gpio-keys binding documentation, as button sub-nodes are not devices."

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

arch/arm/dts/zynq-zc702.dts

@@ -30,8 +30,6 @@
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 		autorepeat;
 		sw14 {
 			label = "sw14";

arch/arm/dts/zynq-zturn.dts

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

arch/arm/dts/zynqmp-zcu100-revC.dts

@@ -48,8 +48,6 @@
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 		autorepeat;
 		sw4 {
 			label = "sw4";

arch/arm/dts/zynqmp-zcu102-revA.dts

@@ -45,8 +45,6 @@
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 		autorepeat;
 		sw19 {
 			label = "sw19";

arch/arm/dts/zynqmp-zcu106-revA.dts

@@ -45,8 +45,6 @@
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 		autorepeat;
 		sw19 {
 			label = "sw19";

arch/arm/dts/zynqmp-zcu111-revA.dts

@@ -45,8 +45,6 @@
 
 	gpio-keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 		autorepeat;
 		sw19 {
 			label = "sw19";