ARM: dts: aspeed: align SPI node name with dtschema

The node names should be generic and DT schema expects certain pattern.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Krzysztof Kozlowski <[e-mail]>

arch/arm/boot/dts/aspeed-bmc-facebook-cloudripper.dts

···
 		i2c55 = &imux55;
 	};
 
-	spi_gpio: spi-gpio {
+	spi_gpio: spi {
 		num-chipselects = <2>;
 		cs-gpios = <&gpio0 ASPEED_GPIO(X, 0) GPIO_ACTIVE_LOW>,
 			   <&gpio0 ASPEED_GPIO(X, 1) GPIO_ACTIVE_HIGH>;

arch/arm/boot/dts/aspeed-bmc-facebook-elbert.dts

···
 		stdout-path = &uart5;
 	};
 
-	spi_gpio: spi-gpio {
+	spi_gpio: spi {
 		num-chipselects = <1>;
 		cs-gpios = <&gpio0 ASPEED_GPIO(X, 0) GPIO_ACTIVE_LOW>;
 	};

arch/arm/boot/dts/aspeed-bmc-facebook-fuji.dts

···
 		i2c143 = &imux143;
 	};
 
-	spi_gpio: spi-gpio {
+	spi_gpio: spi {
 		num-chipselects = <3>;
 		cs-gpios = <&gpio0 ASPEED_GPIO(X, 0) GPIO_ACTIVE_LOW>,
 			   <0>,	/* device reg=<1> does not exist */

arch/arm/boot/dts/aspeed-bmc-facebook-wedge400.dts

···
 	 * full-duplex SPI transactions are not supported by ASPEED SPI
 	 * Controllers.
 	 */
-	spi_gpio: spi-gpio {
+	spi_gpio: spi {
 		status = "okay";
 		compatible = "spi-gpio";
 		#address-cells = <1>;

arch/arm/boot/dts/ast2600-facebook-netbmc-common.dtsi

···
 	 * full-duplex SPI transactions are not supported by ASPEED SPI
 	 * Controllers.
 	 */
-	spi_gpio: spi-gpio {
+	spi_gpio: spi {
 		status = "okay";
 		compatible = "spi-gpio";
 		#address-cells = <1>;