dt: socfpga: Rename snps, dw-spi-mmio to snps, dw-apb-ssi

Linux now also contains SPI driver, yet the name is 'snps,dw-apb-ssi'.
Fix the naming before we have to support both names.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Chin Liang See <clsee@opensource.altera.com>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Cc: Pavel Machek <pavel@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Vince Bridgers <vbridger@opensource.altera.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Acked-by: Pavel Machek <pavel@denx.de>
Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>

arch/arm/dts/socfpga.dtsi

@@ -644,7 +644,7 @@
 		};
 
 		spi0: spi@fff00000 {
-			compatible = "snps,dw-spi-mmio";
+			compatible = "snps,dw-apb-ssi";
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <0xfff00000 0x1000>;
@@ -658,7 +658,7 @@
 		};
 
 		spi1: spi@fff01000 {
-			compatible = "snps,dw-spi-mmio";
+			compatible = "snps,dw-apb-ssi";
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <0xfff01000 0x1000>;

drivers/spi/designware_spi.c

@@ -409,7 +409,7 @@ static const struct dm_spi_ops dw_spi_ops = {
 };
 
 static const struct udevice_id dw_spi_ids[] = {
-	{ .compatible = "snps,dw-spi-mmio" },
+	{ .compatible = "snps,dw-apb-ssi" },
 	{ }
 };