Description of problem:

el6 only properly supports `virtio-transitional` models on devices. In CNV it is right now not or only in a very complex fashion possible to force devices to use `virtio-transitional` models on devices.

Version-Release number of selected component (if applicable):

How reproducible:

• Start a rhel6 VM with virtio bus on its networking interface
• Try to boot from a virtio disk which is not forced to be placed on the root complex

In both cases rhel6 can't use the devices.

Steps to Reproduce:
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Actual results:

Expected results:

Additional info: