ide: fix the ide_release_lock imbalance

ide_release_lock() spits out lots of:

	ide_release_lock: bug

warnings on Atari Falcon.

Fix the ide_release_lock imbalance.

Signed-off-by: Michael Schmitz <schmitz@biophys.uni-duesseldorf.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>