ARM: dts: socfpga: Add Rohm DH2228FV DAC

Enable the SPI node and add the Rohm DH2228FV DAC.
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>

arch/arm/boot/dts/socfpga_cyclone5_socdk.dts

@@ -159,6 +159,16 @@ partition@qspi-rootfs {
 	};
 };
 
+&spi0 {
+	status = "okay";
+
+	spidev@0 {
+		compatible = "rohm,dh2228fv";
+		reg = <0>;
+		spi-max-frequency = <1000000>;
+	};
+};
+
 &usb1 {
 	status = "okay";
 };