RDMA/hns: Fix an error code in hns_roce_create_srq()

The function accidentally returns success on this error path.

Fixes: c7bcb134

 ("RDMA/hns: Add SRQ support for hip08 kernel mode")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Lijun Ou <oulijun@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>