ide: fix locking in drive_release_dev()

* Request queue cleanup should happen before freeing drive->id
  and marking device as non-present.  Fix it.

* Remove superfluous hwif->lock acquiring/releasing.

Cc: Stanislaw Gruszka <stf_xl@wp.pl>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>