arm64: dts: rockchip: add SPI support to helios64

add SPI support for the helios64, u-boot can live in spi1, spi2 is user
accessible, spi5 is for the sata controller rom.
https://wiki.kobol.io/helios64/spi/

Signed-off-by: Dennis Gilmore <dgilmore@redhat.com>
Link: https://lore.kernel.org/r/20210715025635.70452-3-dgilmore@redhat.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-kobol-helios64.dts

@@ -21,6 +21,9 @@ / {
 	aliases {
 		mmc0 = &sdmmc;
 		mmc1 = &sdhci;
+		spi1 = &spi1;
+		spi2 = &spi2;
+		spi5 = &spi5;
 	};
 
 	avdd_0v9_s0: avdd-0v9-s0 {
@@ -473,6 +476,27 @@ &sdmmc {
 	status = "okay";
 };
 
+&spi1 {
+	status = "okay";
+
+	spiflash: flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0x0>;
+		spi-max-frequency = <25000000>;
+		status = "okay";
+		m25p,fast-read;
+	};
+};
+
+/* UEXT connector */
+&spi2 {
+	status = "okay";
+};
+
+&spi5 {
+	status = "okay";
+};
+
 &tcphy1 {
 	/* phy for &usbdrd_dwc3_1 */
 	status = "okay";