IB/mlx5: Expose XRQ legacy commands over the DEVX interface

Expose missing XRQ legacy commands over the DEVX interface.

Signed-off-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190808084358.29517-5-leon@kernel.org


Signed-off-by: Doug Ledford <dledford@redhat.com>