RDMA/hns: Modify to avoid RNR problem

driver inclusion
category: bugfix
bugzilla: NA
CVE: NA

RNR infinite retransmission is setted, and expecting
continuously retransmitted without generating err cqe
when processing work. Actually, an err cqe was generated.
So The clock cycle is adjusted and the continuous
retransmission takes effect.

Feature or Bugfix: Bugfix

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>