RDMA: Delete DEBUG code

There is no need to keep DEBUG defines for out-of-the tree testing.

Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20190819114547.20704-1-leon@kernel.org


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