Revert "pds_core: Fix some kernel-doc comments"

This reverts commit cb39c357

.
Patch was applied to hastily, the problem is already fixed
in Alex's vfio tree:
https://lore.kernel.org/all/20230821112237.105872b5.alex.williamson@redhat.com/

Signed-off-by: Jakub Kicinski <kuba@kernel.org>