ARM: dts: armada-xp: Replace deprecated spi-gpio properties

As stated in Documentation/devicetree/bindings/spi/spi-gpio.yaml,
'gpio-mosi' and 'gpio-sck' are deprecated properties.

Use the recommeded 'mosi-gpios' and 'sck-gpios' instead.
Signed-off-by: Fabio Estevam <festevam@denx.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

arch/arm/boot/dts/armada-xp-lenovo-ix4-300d.dts

@@ -167,8 +167,8 @@ scroll-button {
 	spi-3 {
 		compatible = "spi-gpio";
 		status = "okay";
-		gpio-sck = <&gpio0 25 GPIO_ACTIVE_LOW>;
-		gpio-mosi = <&gpio1 15 GPIO_ACTIVE_LOW>; /*gpio 47*/
+		sck-gpios  = <&gpio0 25 GPIO_ACTIVE_LOW>;
+		mosi-gpios = <&gpio1 15 GPIO_ACTIVE_LOW>; /*gpio 47*/
 		cs-gpios = <&gpio0 27 GPIO_ACTIVE_LOW>;
 		num-chipselects = <1>;
 		#address-cells = <1>;