RDMA/hns: Remove unnecessary check for the sgid_attr when modifying QP

The sgid_attr cannot be null in this scenario. This judgment is redundant.

Fixes: 606bf89e ("RDMA/hns: Refactor for hns_roce_v2_modify_qp function")
Link: https://lore.kernel.org/r/20220409083254.9696-2-liangwenpeng@huawei.comSigned-off-by: Chengchang Tang <tangchengchang@huawei.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -4966,9 +4966,7 @@ static int hns_roce_v2_set_path(struct ib_qp *ibqp,
 		if (ret)
 			return ret;
 
-		if (gid_attr)
-			is_udp = (gid_attr->gid_type ==
-				 IB_GID_TYPE_ROCE_UDP_ENCAP);
+		is_udp = (gid_attr->gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP);
 	}
 
 	/* Only HIP08 needs to set the vlan_en bits in QPC */