This patch adds the necessary documentation identified in:
- pci-passthrough: Explaining live migration and known issues.
- virtual-gpu: Updating the caveats section to clarify what to do
when VF devices are available instead of `mdev`.
The target goal of these series of patch is to enable VFIO devices
migration with kernel variant drivers.
Implements: blueprint migrate-vfio-devices-using-kernel-variant-drivers
Change-Id: I41271a8af5687fb1d18f9d0852492756e096720d
(cherry picked from commit c6a96a17db)
Signed-off-by: René Ribaud <rribaud@redhat.com>