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/udf/ialloc.c b/fs/udf/ialloc.c
index 15c6e99..fb68c9c 100644
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -153,7 +153,7 @@
 	insert_inode_hash(inode);
 	mark_inode_dirty(inode);
 
-	vfs_dq_init(inode);
+	dquot_initialize(inode);
 	ret = dquot_alloc_inode(inode);
 	if (ret) {
 		dquot_drop(inode);