RDMA/bnxt_re: Add support for flow create/destroy

RDMA/bnxt_re: Add support for flow create/destroy

- Added support for create_flow and destroy_flow verbs. These
  verbs are used on RawEth QP to add a specific flow action.
- To support TCP dump on RoCE, added IB_FLOW_ATTR_SNIFFER
  attribute.
- In create_flow verb, driver allocates mirror_vnic and configure it
  with RawEth QP. Once this is done, driver will enable mirroring.
- In destroy_flow, driver will disable mirroring and free the mirror
  vnic.

Signed-off-by: Saravanan Vajravel <saravanan.vajravel@broadcom.com>
Reviewed-by: Kashyap Desai <kashyap.desai@broadcom.com>
Reviewed-by: Selvin Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Link: https://patch.msgid.link/20250822040801.776196-8-kalesh-anakkur.purayil@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>