arm64: zynqmp: Aligned QSPI configuration with latest spec

Official DT binding description for dual stacked/paralllel configurations
have been merged that's why switch to it.

Link: https://lore.kernel.org/r/20220126112608.955728-3-miquel.raynal@bootlin.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/2912091c231f5e945ee44601c285fe16263448da.1695378830.git.michal.simek@amd.com
diff --git a/arch/arm/dts/zynqmp-zcu208-revA.dts b/arch/arm/dts/zynqmp-zcu208-revA.dts
index 0c1f509..7028881 100644
--- a/arch/arm/dts/zynqmp-zcu208-revA.dts
+++ b/arch/arm/dts/zynqmp-zcu208-revA.dts
@@ -644,11 +644,13 @@
 &qspi {
 	status = "okay";
 	is-dual = <1>;
+	num-cs = <2>;
 	flash@0 {
 		compatible = "m25p80", "jedec,spi-nor"; /* U11 and U12 MT25QU02GCBBE12 1Gb */
 		#address-cells = <1>;
 		#size-cells = <1>;
-		reg = <0>;
+		reg = <0>, <1>;
+		parallel-memories = /bits/ 64 <0x10000000 0x10000000>; /* 256MB */
 		spi-tx-bus-width = <4>;
 		spi-rx-bus-width = <4>; /* FIXME also DUAL configuration possible */
 		spi-max-frequency = <108000000>; /* Based on DC1 spec */