Revert "mlx4_ib: Memory leak on Dom0 with SRIOV."

Revert "mlx4_ib: Memory leak on Dom0 with SRIOV."

This reverts commit 08ec6789a9e36fcc849a5c4e172e599233747aa5.

Commit "mlx4_ib: Memory leak on Dom0 with SRIOV" introduced an error,
that the CM message DREQ was silently dropped by the PF passive side,
if the disconnect happened more than 5 seconds after the RTU was
received.

Orabug 25829233 documents that there is memory leak in the mlx4 driver
when the DomUs are destroyed while active. But this patchset does not
influence this leak. The leak is tracked by orabug 25946511.

This commit is a first step to make the uek4 tunneling proxy equal to
upstream and thereafter fix bugs both places.

Orabug: 25829233

Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: Knut Omang <knut.omang@oracle.com>
Acked-by: Shannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: Shamir Rabinovitch <shamir.rabinovitch@oracle.com>