Without this module following scenario does not work:
1. Install the guest with virtio-scsi-pci as system disk and no other
data disk.
2. Change the system disk from virtio-scsi to spapr-vscsi.
redirecting systemd-detect-virt to /dev/null doesn't help with parsing
the output :-/
Also, add "Red Hat" as a vendor.
(cherry picked from commit 4135eea634)