RDMA/hns: Eanble SRQ capacity for hip08

This patch configures the flags for enabling the
SRQ(Share Receive Queue) capacity as well as update the
verb of querying device for setting srq specifications.

Signed-off-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>