vfio/ccw: Pass enum to FSM event jumptable

vfio/ccw: Pass enum to FSM event jumptable

The FSM has an enumerated list of events defined.
Use that as the argument passed to the jump table,
instead of a regular int.

Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Link: https://lore.kernel.org/r/20220707135737.720765-6-farman@linux.ibm.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>