[IDE] Use the block layer deferred softirq request completion

This patch makes IDE use the new blk_complete_request() interface.
There's still room for improvement, as __ide_end_request() really
could drop the lock after getting HWGROUP->rq (why does it need to
hold it in the first place? If ->rq access isn't serialized, we are
screwed anyways).

Signed-off-by: Jens Axboe <axboe@suse.de>
diff --git a/drivers/ide/ide-probe.c b/drivers/ide/ide-probe.c
index 02167a5..1ddaa71 100644
--- a/drivers/ide/ide-probe.c
+++ b/drivers/ide/ide-probe.c
@@ -1011,6 +1011,8 @@
 	blk_queue_max_hw_segments(q, max_sg_entries);
 	blk_queue_max_phys_segments(q, max_sg_entries);
 
+	blk_queue_softirq_done(q, ide_softirq_done);
+
 	/* assign drive queue */
 	drive->queue = q;