RDMA/hns: Fix configuration of ack_req_freq in QPC

mainline inclusion
from mainline-v5.9
commit fbed9d2b
category: bugfix
bugzilla: NA
CVE: NA

The hardware will add AckReq flag in BTH header according to the value of ack_req_freq to
request ACK from responder for the packets with this flag. It should be greater than or equal to lp_pktn_ini instead of using a fixed value.

Signed-off-by: Shunfeng Yang <yangshunfeng2@huawei.com>
Signed-off-by: Yangyang Li <liyangyang20@huawei.com>
Reviewed-by: chunzhi hu <huchunzhi@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>