ARM: dts: BCM5301X: Use updated "spi-gpio" binding properties

Switch away from deprecated properties.

This fixes:
arch/arm/boot/dts/bcm4708-buffalo-wzr-1750dhp.dtb: spi: gpio-sck: False schema does not allow [[6, 7, 0]]
        From schema: Documentation/devicetree/bindings/spi/spi-gpio.yaml
arch/arm/boot/dts/bcm4708-buffalo-wzr-1750dhp.dtb: spi: gpio-mosi: False schema does not allow [[6, 4, 0]]
        From schema: Documentation/devicetree/bindings/spi/spi-gpio.yaml
arch/arm/boot/dts/bcm4708-buffalo-wzr-1750dhp.dtb: spi: 'sck-gpios' is a required property
        From schema: Documentation/devicetree/bindings/spi/spi-gpio.yaml
arch/arm/boot/dts/bcm4708-buffalo-wzr-1750dhp.dtb: spi: Unevaluated properties are not allowed ('gpio-mosi', 'gpio-sck' were unexpected)
        From schema: Documentation/devicetree/bindings/spi/spi-gpio.yaml
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Link: https://lore.kernel.org/r/20230602151023.8607-1-zajec5@gmail.comSigned-off-by: Florian Fainelli <florian.fainelli@broadcom.com>

arch/arm/boot/dts/bcm4708-buffalo-wzr-1166dhp-common.dtsi

@@ -16,8 +16,8 @@ / {
 	spi {
 		compatible = "spi-gpio";
 		num-chipselects = <1>;
-		gpio-sck = <&chipcommon 7 0>;
-		gpio-mosi = <&chipcommon 4 0>;
+		sck-gpios = <&chipcommon 7 0>;
+		mosi-gpios = <&chipcommon 4 0>;
 		cs-gpios = <&chipcommon 6 0>;
 		#address-cells = <1>;
 		#size-cells = <0>;

arch/arm/boot/dts/bcm4708-buffalo-wzr-1750dhp.dts

@@ -28,8 +28,8 @@ memory@0 {
 	spi {
 		compatible = "spi-gpio";
 		num-chipselects = <1>;
-		gpio-sck = <&chipcommon 7 0>;
-		gpio-mosi = <&chipcommon 4 0>;
+		sck-gpios = <&chipcommon 7 0>;
+		mosi-gpios = <&chipcommon 4 0>;
 		cs-gpios = <&chipcommon 6 0>;
 		#address-cells = <1>;
 		#size-cells = <0>;

arch/arm/boot/dts/bcm47081-buffalo-wzr-600dhp2.dts

@@ -28,8 +28,8 @@ memory@0 {
 	spi {
 		compatible = "spi-gpio";
 		num-chipselects = <1>;
-		gpio-sck = <&chipcommon 7 0>;
-		gpio-mosi = <&chipcommon 4 0>;
+		sck-gpios = <&chipcommon 7 0>;
+		mosi-gpios = <&chipcommon 4 0>;
 		cs-gpios = <&chipcommon 6 0>;
 		#address-cells = <1>;
 		#size-cells = <0>;

arch/arm/boot/dts/bcm47081-buffalo-wzr-900dhp.dts

@@ -28,8 +28,8 @@ memory@0 {
 	spi {
 		compatible = "spi-gpio";
 		num-chipselects = <1>;
-		gpio-sck = <&chipcommon 7 0>;
-		gpio-mosi = <&chipcommon 4 0>;
+		sck-gpios = <&chipcommon 7 0>;
+		mosi-gpios = <&chipcommon 4 0>;
 		cs-gpios = <&chipcommon 6 0>;
 		#address-cells = <1>;
 		#size-cells = <0>;