Put the ioat2 and ioat3 state machines in the halted state with all
errors cleared.

The ioat1 init path is not disturbed for stability, there are no
reported ioat1 initiaization issues.

Cc: <stable@kernel.org>
Reported-by: NRoland Dreier <rdreier@cisco.com>
Tested-by: NRoland Dreier <rdreier@cisco.com>
Acked-by: NSimon Horman <horms@verge.net.au>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>