ARM: dts: at91: calao_usb: fix button nodes

Adhere naming to DT schema. And remove the unneeded #*-cells. Found by
'make dtbs_check'.

Signed-off-by: Wolfram Sang <[e-mail]>
Acked-by: Nicolas Ferre <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Claudiu Beznea <[e-mail]>

arch/arm/boot/dts/microchip/usb_a9260_common.dtsi

···
 
 	gpio_keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 
-		user_pb {
+		button-user-pb {
 			label = "user_pb";
 			gpios = <&pioB 10 GPIO_ACTIVE_LOW>;
 			linux,code = <28>;

arch/arm/boot/dts/microchip/usb_a9263.dts

···
 
 	gpio_keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 
-		user_pb {
+		button-user-pb {
 			label = "user_pb";
 			gpios = <&pioB 10 GPIO_ACTIVE_LOW>;
 			linux,code = <28>;

arch/arm/boot/dts/microchip/usb_a9g20-dab-mmx.dtsi

···
 
 	gpio_keys {
 		compatible = "gpio-keys";
-		#address-cells = <1>;
-		#size-cells = <0>;
 
-		user_pb1 {
+		button-user-pb1 {
 			label = "user_pb1";
 			gpios = <&pioB 25 GPIO_ACTIVE_LOW>;
 			linux,code = <0x100>;
 		};
 
-		user_pb2 {
+		button-user-pb2 {
 			label = "user_pb2";
 			gpios = <&pioB 13 GPIO_ACTIVE_LOW>;
 			linux,code = <0x101>;
 		};
 
-		user_pb3 {
+		button-user-pb3 {
 			label = "user_pb3";
 			gpios = <&pioA 26 GPIO_ACTIVE_LOW>;
 			linux,code = <0x102>;
 		};
 
-		user_pb4 {
+		button-user-pb4 {
 			label = "user_pb4";
 			gpios = <&pioC 9 GPIO_ACTIVE_LOW>;
 			linux,code = <0x103>;