dquot: cleanup dquot initialize routine

Get rid of the initialize dquot operation - it is now always called from
the filesystem and if a filesystem really needs it's own (which none
currently does) it can just call into it's own routine directly.

Rename the now static low-level dquot_initialize helper to __dquot_initialize
and vfs_dq_init to dquot_initialize to have a consistent namespace.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/jfs/jfs_inode.c b/fs/jfs/jfs_inode.c
index 72b3089..829921b 100644
--- a/fs/jfs/jfs_inode.c
+++ b/fs/jfs/jfs_inode.c
@@ -116,7 +116,7 @@
 	/*
 	 * Allocate inode to quota.
 	 */
-	vfs_dq_init(inode);
+	dquot_initialize(inode);
 	rc = dquot_alloc_inode(inode);
 	if (rc)
 		goto fail_drop;