arm64: zynqmp: Align nvmem node with dt schema

Use new soc-nvmem node name and swich to nvmem fixed layout.
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/7796804c7c7dd8bb2c93bdfe028c22746a24fe54.1716802450.git.michal.simek@amd.com

arch/arm64/boot/dts/xilinx/zynqmp.dtsi

@@ -207,13 +207,16 @@ zynqmp_power: power-management {
 				mbox-names = "tx", "rx";
 			};
 
-			nvmem-firmware {
+			soc-nvmem {
 				compatible = "xlnx,zynqmp-nvmem-fw";
-				#address-cells = <1>;
-				#size-cells = <1>;
-
-				soc_revision: soc-revision@0 {
-					reg = <0x0 0x4>;
+				nvmem-layout {
+					compatible = "fixed-layout";
+					#address-cells = <1>;
+					#size-cells = <1>;
+
+					soc_revision: soc-revision@0 {
+						reg = <0x0 0x4>;
+					};
 				};
 			};