ide: don't clear special on ide_queue_rq() entry

We can't use RQF_DONTPREP to see if we should clear ->special,
as someone could have set that while inserting the request. Make
sure we clear it in our ->initialize_rq_fn() helper instead.

Fixes: 22ce0a7ccf ("ide: don't use req->special")
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/ide/ide-probe.c

@@ -746,6 +746,7 @@ static void ide_initialize_rq(struct request *rq)
 {
 	struct ide_request *req = blk_mq_rq_to_pdu(rq);
 
+	req->special = NULL;
 	scsi_req_init(&req->sreq);
 	req->sreq.sense = req->sense;
 }