RDMA/mlx5: Clear old rate limit when closing QP

[ Upstream commit c8973df2 ]

Before QP is closed it changes to ERROR state, when this happens
the QP was left with old rate limit that was already removed from
the table.

Fixes: 7d29f349 ("IB/mlx5: Properly adjust rate limit on QP state transitions")
Signed-off-by: Rafi Wiener <rafiw@mellanox.com>
Signed-off-by: Oleg Kuporosov <olegk@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Link: https://lore.kernel.org/r/20191002120243.16971-1-leon@kernel.org


Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>