xfs: remove XFS_QMOPT_DQSUSER

Just read the id 0 dquot from disk directly in xfs_qm_init_quotainfo instead
of going through dqget and requiring a special flag to not add the dquot to
any lists.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index cc0149d..a1d91d8 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -129,6 +129,8 @@
 				     (XFS_IS_UQUOTA_ON((d)->q_mount)) : \
 				     (XFS_IS_OQUOTA_ON((d)->q_mount))))
 
+extern int		xfs_qm_dqread(struct xfs_mount *, xfs_dqid_t, uint,
+					uint, struct xfs_dquot	**);
 extern void		xfs_qm_dqdestroy(xfs_dquot_t *);
 extern int		xfs_qm_dqflush(xfs_dquot_t *, uint);
 extern void		xfs_qm_dqpurge(xfs_dquot_t *);