ide: convert "empty" REQ_TYPE_ATA_CMD requests to use REQ_TYPE_ATA_TASKFILE

Based on the previous work by Tejun Heo.

There should be no functionality changes caused by this patch.

Cc: Tejun Heo <htejun@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index b8c7e81..9404650 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -781,7 +781,7 @@
 		struct request rq;
 
 		ide_init_drive_cmd(&rq);
-		rq.cmd_type = REQ_TYPE_ATA_CMD;
+		rq.cmd_type = REQ_TYPE_ATA_TASKFILE;
 
 		return ide_do_drive_cmd(drive, &rq, ide_wait);
 	}