arm64: dts: allwinner: t527: orangepi-4a: Enable SPI-NOR flash

The Orangepi 4A has a SPI-NOR flash connected to spi0 on the PC pins.
The HOLD and WP pins are not connected, and are instead pulled up by the
supply rail.

Enable spi0 and add a device node for the SPI-NOR flash.

Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://patch.msgid.link/20251221110513.1850535-5-wens@kernel.org
Signed-off-by: Chen-Yu Tsai <wens@kernel.org>

Author: wens

arch/arm64/boot/dts/allwinner/sun55i-t527-orangepi-4a.dts

@@ -400,6 +400,21 @@
 	assigned-clock-rates = <32768>;
 };
 
+&spi0  {
+	pinctrl-names = "default";
+	pinctrl-0 = <&spi0_pc_pins>, <&spi0_cs0_pc_pin>;
+	status = "okay";
+
+	flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <20000000>;
+		vcc-supply = <&reg_cldo1>;
+	};
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pb_pins>;