Fix range size calculation to include the last byte of each range.

In addition, log round up the length of the total ranges to be stricter.

Fixes: c1d050b0 ("vfio/mlx5: Create and destroy page tracker object")
Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Link: https://lore.kernel.org/r/20230208152234.32370-1-yishaih@nvidia.comSigned-off-by: Alex Williamson <alex.williamson@redhat.com>