!3304 roh/core: Synchronously update the mac address of the vlan device when...

!3304 roh/core: Synchronously update the mac address of the vlan device when configuring the vlan device ip

Merge Pull Request from: @chenke1978 
 
In ROH mode, when the IP address of a VLAN device changes, we need
to change the MAC address of the VLAN device to maintain the mapping
between the IP address, EID, and MAC address. In this way, the ARP
fast response in ROH mode can take effect. 
 
Link:https://gitee.com/openeuler/kernel/pulls/3304

 

Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>