arm64: dts: rockchip: add rk356x sfc support

Add the sfc node to the rk356x device tree. This enables spi flash
support for this soc.
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Link: https://lore.kernel.org/r/20220429115252.2360496-5-pgwipeout@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk356x.dtsi

@@ -778,6 +778,17 @@ sdmmc1: mmc@fe2c0000 {
 		status = "disabled";
 	};
 
+	sfc: spi@fe300000 {
+		compatible = "rockchip,sfc";
+		reg = <0x0 0xfe300000 0x0 0x4000>;
+		interrupts = <GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cru SCLK_SFC>, <&cru HCLK_SFC>;
+		clock-names = "clk_sfc", "hclk_sfc";
+		pinctrl-0 = <&fspi_pins>;
+		pinctrl-names = "default";
+		status = "disabled";
+	};
+
 	sdhci: mmc@fe310000 {
 		compatible = "rockchip,rk3568-dwcmshc";
 		reg = <0x0 0xfe310000 0x0 0x10000>;