quota: rename default quotactl methods to dquot_

Follow the dquot_* style used elsewhere in dquot.c.

[Jan Kara: Fixed up missing conversion of ext2]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 2e7ec5e..b38f96b 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -483,7 +483,7 @@
 	sb->s_export_op = &jfs_export_operations;
 #ifdef CONFIG_QUOTA
 	sb->dq_op = &dquot_operations;
-	sb->s_qcop = &vfs_quotactl_ops;
+	sb->s_qcop = &dquot_quotactl_ops;
 #endif
 
 	/*