xfs: merge xfs_dir2_data_freescan and xfs_dir2_data_freescan_int

xfs: merge xfs_dir2_data_freescan and xfs_dir2_data_freescan_int

Source kernel commit: ae42976de7f1022e6d83f5560debc072929921a9

There is no real need for xfs_dir2_data_freescan wrapper, so rename
xfs_dir2_data_freescan_int to xfs_dir2_data_freescan and let the
callers dereference the mount pointer from the inode.

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>