RDMA/hns: Move SRQ code to the reasonable place

Just move the SRQ related code to more reasonable place, and unify format
of some prints.

Link: https://lore.kernel.org/r/1588071823-40200-5-git-send-email-liweihang@huawei.comSigned-off-by: NYixian Liu <liuyixian@huawei.com>
Signed-off-by: NWeihang Li <liweihang@huawei.com>
Signed-off-by: NJason Gunthorpe <jgg@mellanox.com>