[MTD] set blkdev parent to the mtd device, not its parent

Signed-off-by: David Woodhouse <[e-mail]>

drivers/mtd/mtd_blkdevs.c

···
 	gd->private_data = new;
 	new->blkcore_priv = gd;
 	gd->queue = tr->blkcore_priv->rq;
-	gd->driverfs_dev = new->mtd->dev.parent;
+	gd->driverfs_dev = &new->mtd->dev;
 
 	if (new->readonly)
 		set_disk_ro(gd, 1);