RDMA/bnxt_re: Report udp source port for flow_label in bnxt_re_query_qp

RDMA/bnxt_re: Report udp source port for flow_label in bnxt_re_query_qp

The firmware doesn't capture the flow_label. Therefore the value
that's always returned by qplib_qp->ah.flow_label is 0 whenever
a qp is created. And as per IB spec, udp source port can be reported
for flow_label. Hence reported udp source port for flow_label in
bnxt_re_query_qp by populating the value of qplib_qp->udp_sport
into qp_attr->ah_attr.grh.flow_label.

Signed-off-by: Abhishek Mohapatra <abhishek.mohapatra@broadcom.com>
Signed-off-by: Saravanan Vajravel <saravanan.vajravel@broadcom.com>
Link: https://patch.msgid.link/20250814112555.221665-8-kalesh-anakkur.purayil@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>