dquot: cleanup inode allocation / freeing routines

Get rid of the alloc_inode and free_inode dquot operations - they are
always called from the filesystem and if a filesystem really needs
their own (which none currently does) it can just call into it's
own routine directly.

Also get rid of the vfs_dq_alloc/vfs_dq_free wrappers and always
call the lowlevel dquot_alloc_inode / dqout_free_inode routines
directly, which now lose the number argument which is always 1.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index b2ae190..2562d18 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -159,7 +159,7 @@
 		 * Free the inode from the quota allocation.
 		 */
 		vfs_dq_init(inode);
-		vfs_dq_free_inode(inode);
+		dquot_free_inode(inode);
 		vfs_dq_drop(inode);
 	}