RDMA/hns: Encapsulate some lines for setting sq size in user mode

It needs to check the sq size with integrity when configures
the relatived parameters of sq. Here moves the relatived code
into a special function.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Link: https://lore.kernel.org/r/1565276034-97329-2-git-send-email-oulijun@huawei.com


Signed-off-by: Doug Ledford <dledford@redhat.com>