arm64: dts: hip06: Fix no reg property warning

Warning (unit_address_vs_reg): Node /soc/ethernet@4 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/ethernet@5 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/ethernet@0 has a unit name, but no reg property
Warning (unit_address_vs_reg): Node /soc/ethernet@1 has a unit name, but no reg property

Fix warning when build with W=1.

Cc: Kejian Yan <yankejian@huawei.com>
Cc: Yisen Zhuang <yisen.zhuang@huawei.com>
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/boot/dts/hisilicon/hip06.dtsi

@@ -508,7 +508,7 @@ port@5 {
 			};
 		};
 
-		eth0: ethernet@4{
+		eth0: ethernet-4{
 			compatible = "hisilicon,hns-nic-v2";
 			ae-handle = <&dsaf0>;
 			port-idx-in-ae = <4>;
@@ -517,7 +517,7 @@ eth0: ethernet@4{
 			dma-coherent;
 		};
 
-		eth1: ethernet@5{
+		eth1: ethernet-5{
 			compatible = "hisilicon,hns-nic-v2";
 			ae-handle = <&dsaf0>;
 			port-idx-in-ae = <5>;
@@ -526,7 +526,7 @@ eth1: ethernet@5{
 			dma-coherent;
 		};
 
-		eth2: ethernet@0{
+		eth2: ethernet-0{
 			compatible = "hisilicon,hns-nic-v2";
 			ae-handle = <&dsaf0>;
 			port-idx-in-ae = <0>;
@@ -535,7 +535,7 @@ eth2: ethernet@0{
 			dma-coherent;
 		};
 
-		eth3: ethernet@1{
+		eth3: ethernet-1{
 			compatible = "hisilicon,hns-nic-v2";
 			ae-handle = <&dsaf0>;
 			port-idx-in-ae = <1>;