This converts three devices because apic and ioapic are subclasses of sysbus.
Converting subclasses independently of their base class is prohibitively hard.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Split up the IOAPIC analogously to APIC and i8259. KVM will share the
IOAPICCommonState, the vmstate, reset logic and certain init parts with
the user space model.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
