Use xfs_icluster_size_fsb() in xfs_ifree_cluster(), rename variable
ninodes to inodes_per_cluster, the latter is more meaningful.
Signed-off-by: NJie Liu <jeff.liu@oracle.com>
Reviewed-by: NDave Chinner <dchinner@redhat.com>
Signed-off-by: NDave Chinner <david@fromorbit.com>