xfs: remove xfs_getsb

Merge xfs_getsb into its only caller, and clean that one up a little bit
as well.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
3 files changed