RDMA/efa: Add RDMA write HW statistics counters

RDMA/efa: Add RDMA write HW statistics counters

Update device API and request RDMA write counters if RDMA write is
supported by device. Expose newly added counters through ib core
counters mechanism.

Reviewed-by: Daniel Kranzdorf <dkkranzd@amazon.com>
Reviewed-by: Yonatan Nachum <ynachum@amazon.com>
Signed-off-by: Michael Margolin <mrgolin@amazon.com>
Link: https://lore.kernel.org/r/20230703153404.30877-1-mrgolin@amazon.com
Reviewed-by: Gal Pressman <gal.pressman@linux.dev>
Signed-off-by: Leon Romanovsky <leon@kernel.org>