ARM: dts: rockchip: rk3288 add efuse_id for cpuinfo

Add efuse_id for cpuinfo to get system serial number.

Change-Id: If197c2961611364a2cb94972c33171bea105c61b
Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>

arch/arm/boot/dts/rk3288-android.dtsi

@@ -50,6 +50,12 @@
 		bootargs = "earlycon=uart8250,mmio32,0xff690000 vmalloc=496M";
 	};
 
+	cpuinfo {
+		compatible = "rockchip,cpuinfo";
+		nvmem-cells = <&efuse_id>;
+		nvmem-cell-names = "id";
+	};
+
 	/delete-node/ dmc@ff610000;
 
 	dfi: dfi {

arch/arm/boot/dts/rk3288.dtsi

@@ -1618,6 +1618,9 @@
 		clocks = <&cru PCLK_EFUSE256>;
 		clock-names = "pclk_efuse";
 
+		efuse_id: id@7 {
+			reg = <0x7 0x10>;
+		};
 		cpu_leakage: cpu_leakage@17 {
 			reg = <0x17 0x1>;
 		};