xfs: quota scrub should use bmapbtd scrubber

Replace the quota scrubber's open-coded data fork scrubber with a
redirected call to the bmapbtd scrubber.  This strengthens the quota
scrub to include all the cross-referencing that it does.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>

fs/xfs/scrub/common.h

@@ -155,4 +155,6 @@ static inline bool xfs_scrub_skip_xref(struct xfs_scrub_metadata *sm)
 			       XFS_SCRUB_OFLAG_XCORRUPT);
 }
 
+int xfs_scrub_metadata_inode_forks(struct xfs_scrub_context *sc);
+
 #endif	/* __XFS_SCRUB_COMMON_H__ */