xfs: devirtualize ->data_entry_tag_p

xfs: devirtualize ->data_entry_tag_p

Source kernel commit: 7e8ae7bd1c5d806316e6b6403ac2dd0be7a1f82b

Replace the ->data_entry_tag_p dir ops method with a directly called
xfs_dir2_data_entry_tag_p helper that takes care of the differences
between the directory format with and without the file type field.

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>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>