ext4: Fix warning in blkdev_put()

ext4_blkdev_remove() passes a wrong holder pointer to blkdev_put() which
triggers a warning there. Fix it.

Fixes: 2736e8eeb0cc ("block: use the holder as indication for exclusive opens")
Signed-off-by: Jan Kara <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Jens Axboe <[e-mail]>

fs/ext4/super.c

···
 	struct block_device *bdev;
 	bdev = sbi->s_journal_bdev;
 	if (bdev) {
-		blkdev_put(bdev, sbi->s_es);
+		blkdev_put(bdev, sbi->s_sb);
 		sbi->s_journal_bdev = NULL;
 	}
 }