RDMA/hns: Deliver net device event to ofed

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

Driver should notify ofed when net link up or link down.
It is a requirement from Application.

Feature or Bugfix:Feature

Signed-off-by: wangsirong <wangsirong@huawei.com>
Signed-off-by: liyangyang (M) <liyangyang20@huawei.com>
Reviewed-by: oulijun <oulijun@huawei.com>
Reviewed-by: liuyixian <liuyixian@huawei.com>
Reviewed-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>