arm: zynq: Use s25fl256s1 compatible string on zedboard

Use compatible string which is listed in the Linux kernel.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Link: https://lore.kernel.org/r/49bc6b056b0f6f69d4d90351dc875a66b7e37619.1631715748.git.michal.simek@xilinx.com
diff --git a/arch/arm/dts/zynq-zed.dts b/arch/arm/dts/zynq-zed.dts
index 7a540b6..cf28167 100644
--- a/arch/arm/dts/zynq-zed.dts
+++ b/arch/arm/dts/zynq-zed.dts
@@ -53,7 +53,7 @@
 	status = "okay";
 	num-cs = <1>;
 	flash@0 {
-		compatible = "spansion,s25fl256s", "jedec,spi-nor";
+		compatible = "spansion,s25fl256s1", "jedec,spi-nor";
 		reg = <0>;
 		spi-max-frequency = <30000000>;
 		m25p,fast-read;