Total removal of QEMUMachineInitArgs struct. QEMUMachineInitArgs's fields
are copied into MachineState. Removed duplicated fields from MachineState.

All the other changes are only mechanical refactoring, no semantic changes.
Signed-off-by: NMarcel Apfelbaum <marcel.a@redhat.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> (s390)
Reviewed-by: Michael S. Tsirkin <mst@redhat.com> (PC)
[AF: Renamed ms -> machine, use MACHINE_GET_CLASS()]
Signed-off-by: NAndreas Färber <afaerber@suse.de>