ARM: dts: imx7d-sdb: 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>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx7d-sdb.dts

@@ -43,8 +43,8 @@ spi-4 {
 		compatible = "spi-gpio";
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_spi4>;
-		gpio-sck = <&gpio1 13 GPIO_ACTIVE_HIGH>;
-		gpio-mosi = <&gpio1 9 GPIO_ACTIVE_HIGH>;
+		sck-gpios = <&gpio1 13 GPIO_ACTIVE_HIGH>;
+		mosi-gpios = <&gpio1 9 GPIO_ACTIVE_HIGH>;
 		cs-gpios = <&gpio1 12 GPIO_ACTIVE_LOW>;
 		num-chipselects = <1>;
 		#address-cells = <1>;