arm64: dts: broadcom: bcmbca: bcm4908: use NVMEM layout for Asus GT-AC5300

Defining NVMEM cells as direct subnodes is deprecated since commit
bd912c9 ("dt-bindings: nvmem: layouts: add fixed-layout"). Use new
syntax based on NVMEM layout.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Link: https://lore.kernel.org/r/20240111115617.12072-1-zajec5@gmail.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>

Author: Rafał Miłecki

arch/arm64/boot/dts/broadcom/bcmbca/bcm4908-asus-gt-ac5300.dts

@@ -181,16 +181,17 @@
 		#size-cells = <1>;
 
 		partition@0 {
-			compatible = "nvmem-cells";
 			label = "cferom";
 			reg = <0x0 0x100000>;
 
-			#address-cells = <1>;
-			#size-cells = <1>;
-			ranges = <0 0x0 0x100000>;
+			nvmem-layout {
+				compatible = "fixed-layout";
+				#address-cells = <1>;
+				#size-cells = <1>;
 
-			base_mac_addr: mac@106a0 {
-				reg = <0x106a0 0x6>;
+				base_mac_addr: mac@106a0 {
+					reg = <0x106a0 0x6>;
+				};
 			};
 		};