add cpu node name

arch/arm64/boot/dts/rockchip/rk3588.dtsi

@@ -27,6 +27,10 @@
 		usbdp1 = &usbdp_phy1;
 	};
 
+	system {
+		cpu,model = "Rockchip RK3588";
+	};
+
 	rkcif_mipi_lvds4: rkcif-mipi-lvds4 {
 		compatible = "rockchip,rkcif-mipi-lvds";
 		rockchip,hw = <&rkcif>;

arch/arm64/boot/dts/rockchip/rk3588j.dtsi

@@ -6,6 +6,12 @@
 
 #include "rk3588.dtsi"
 
+/{
+	system {
+		cpu,model = "Rockchip RK3588J";
+	};
+};
+
 &cluster0_opp_table {
 	/*
 	 * The Max frequency is 1296MHz in default normal mode.

arch/arm64/boot/dts/rockchip/rk3588m.dtsi

@@ -5,3 +5,9 @@
  */
 
 #include "rk3588.dtsi"
+
+/{
+	system {
+		cpu,model = "Rockchip RK3588M";
+	};
+};

arch/arm64/boot/dts/rockchip/rk3588s.dtsi

@@ -22,6 +22,10 @@
 	#address-cells = <2>;
 	#size-cells = <2>;
 
+	system {
+		cpu,model = "Rockchip RK3588S";
+	};
+
 	aliases {
 		csi2dcphy0 = &csi2_dcphy0;
 		csi2dcphy1 = &csi2_dcphy1;