NetworkPkg: Update the Ethernet interface name.

Update the interface name from ethA ethB to
eth10, eth11 etc if port number more than 9.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Zhang Lubo <lubo.zhang@intel.com>
Cc: Sriram Subramanian <sriram-s@hpe.com>
Cc: Ye Ting <ting.ye@intel.com>
Cc: Fu Siyuan <siyuan.fu@intel.com>
Cc: Wu Jiaxin <jiaxin.wu@intel.com>
Reviewed-by: Sriram Subramanian <sriram-s@hpe.com>
Reviewed-by: Wu Jiaxin <jiaxin.wu@intel.com>
Reviewed-by: Fu Siyuan <siyuan.fu@intel.com>

NetworkPkg/Ip6Dxe/Ip6ConfigImpl.c

@@ -1441,7 +1441,7 @@ Ip6ConfigInitIfInfo (
   UnicodeSPrint (
     IfInfo->Name,
     sizeof (IfInfo->Name),
-    L"eth%x",
+    L"eth%d",
     IpSb->Ip6ConfigInstance.IfIndex
   );