arm64: dts: amlogic: ODROID-C2: add cpuinfo

Author: scpcom

arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts

@@ -24,6 +24,12 @@
 		stdout-path = "serial0:115200n8";
 	};
 
+	cpuinfo {
+		compatible = "amlogic,meson-gx-cpuinfo";
+		nvmem-cells = <&sn>;
+		nvmem-cell-names = "sn";
+	};
+
 	memory@0 {
 		device_type = "memory";
 		reg = <0x0 0x0 0x0 0x80000000>;