RDMA/bnxt_re: Update ABI to pass wqe-mode to user space

Changing ucontext ABI response structure to pass wqe_mode to user library.
A flag in comp_mask has been set to indicate presence of wqe_mode.

Moved wqe-mode ABI to uapi/rdma/bnxt_re-abi.h

Link: https://lore.kernel.org/r/20210616202817.1185276-1-devesh.sharma@broadcom.com
Signed-off-by: Devesh Sharma <devesh.sharma@broadcom.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>