On SR-IOV capable deployments when rebooting a compute node,
vfio_iommu_type1 will not be loaded which will cause guest
instances with VF/PF fail to start/spawn.
Manually loading the kernel module will allow to spawn guest
instances successfully.
Change-Id: I3ffd1c11a1851e62992a6a63e8abb130db82856f
Closes-Bug: 1838159