Indicate PCI removability through ACPI _RMV method, so that Windows guests does not expose non-hotpluggable PCI devices as "hot removable".
v2: - Mark slots with no present devices as hotpluggable.
Indicate PCI removability through ACPI _RMV method, so that Windows guests does not expose non-hotpluggable PCI devices as "hot removable".
v2: - Mark slots with no present devices as hotpluggable.