RDMA/bnxt_re: Initialize fw with roce_mirror support

RDMA/bnxt_re: Initialize fw with roce_mirror support

- Check FW capability for roce_mirror support.
- Initialize FW with roce_mirror support.
- When modifying QP, use unique GID for sgid incase of RawEth QP.

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>
Reviewed-by: Anantha Prabhu <anantha.prabhu@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Link: https://patch.msgid.link/20250822040801.776196-9-kalesh-anakkur.purayil@broadcom.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>