qemu_hostdev: Introduce qemuHostdevNeedsVFIO()
There are two types of host devices that require /dev/vfio/vfio access: 1) PCI devices with VFIO backend 2) Mediated devices Introduce a simple helper that returns true if passed @hostdev falls in either of the categories. Signed-off-by: NMichal Privoznik <mprivozn@redhat.com> Reviewed-by: NCole Robinson <crobinso@redhat.com>
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