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/ufs/inode.c b/fs/ufs/inode.c
index fff8eda..09aef49 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -910,7 +910,7 @@
 	loff_t old_i_size;
 
 	if (!is_bad_inode(inode))
-		vfs_dq_init(inode);
+		dquot_initialize(inode);
 
 	truncate_inode_pages(&inode->i_data, 0);
 	if (is_bad_inode(inode))