arm64: dts: freescale: sl28: add SPI flash

There is a SPI flash on this carrier connected to the third DSPI
controller. Add it.
Signed-off-by: Michael Walle <michael@walle.cc>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28-var3-ads2.dts

@@ -68,6 +68,15 @@ dailink1_master: codec {
 	};
 };
 
+&dspi2 {
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		m25p,fast-read;
+		spi-max-frequency = <100000000>;
+		reg = <0>;
+	};
+};
+
 &i2c4 {
 	status = "okay";
 

arch/arm64/boot/dts/freescale/fsl-ls1028a-kontron-sl28.dts

@@ -17,6 +17,8 @@ aliases {
 		crypto = &crypto;
 		serial0 = &duart0;
 		serial1 = &duart1;
+		spi0 = &fspi;
+		spi1 = &dspi2;
 	};
 
 	chosen {
@@ -24,6 +26,10 @@ chosen {
 	};
 };
 
+&dspi2 {
+	status = "okay";
+};
+
 &duart0 {
 	status = "okay";
 };