Merge commit '
d2f2b8a740c82319f9eea51ebed50815fbc3da3e' into upstream-merge
* commit '
d2f2b8a740c82319f9eea51ebed50815fbc3da3e':
kvm: test for ioeventfd support on old kernels
virtio: move vmstate change tracking to core
virtio-pci: Rename bugs field to flags
qxl: tag as not hotpluggable
vga: tag as not hotplugable.
piix: tag as not hotpluggable.
pci: allow devices being tagged as not hotpluggable.
rtl8139: Use subsection to restrict migration after hotplug
qdev: Track runtime machine modifications
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>