Revert "mlx4: avoid multiple free on id_map_ent"

Revert "mlx4: avoid multiple free on id_map_ent"

This reverts commit 1cae1a0ad2fe88499f2fd847d50b101d1985926b.

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.

In order to cleanly revert it, this dependant commit needs to be
reverted as well.

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.

Note that this commit also included a renaming of a variable. This
will be re-introduced in a later commit.

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>