arm64: dts: rockchip: Enable internal SPI flash for ROCK Pi 4A/B/C

The ROCK Pi 4A, ROCK Pi 4B and ROCK Pi 4C boards contain a nor-flash chip
connected to spi1. Enable spi1 and add the device node.

This patch has been tested on ROCK Pi 4A.
Signed-off-by: Stefan Nagy <stefan.nagy@ixypsilon.net>
Link: https://lore.kernel.org/r/20230811201118.15066-1-stefan.nagy@ixypsilon.netSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts

@@ -12,3 +12,13 @@ / {
 	model = "Radxa ROCK Pi 4A";
 	compatible = "radxa,rockpi4a", "radxa,rockpi4", "rockchip,rk3399";
 };
+
+&spi1 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+	};
+};

arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts

@@ -31,6 +31,16 @@ brcmf: wifi@1 {
 	};
 };
 
+&spi1 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+	};
+};
+
 &uart0 {
 	status = "okay";
 

arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts

@@ -43,6 +43,16 @@ &sound {
 	hp-det-gpio = <&gpio1 RK_PA0 GPIO_ACTIVE_HIGH>;
 };
 
+&spi1 {
+	status = "okay";
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <10000000>;
+	};
+};
+
 &uart0 {
 	status = "okay";