avoid MCO for vfio-pci. Find more elegent way to load vfio-pci by default

[mregmi]

Issue:
vfio-pci driver is needed by QAT and needs to be loaded before plugin is deployed. For now there is a MCO that loads the driver. We want to move away from the MCO.

Potential solution
We can load the vfio-pci driver using initcontainers.

[mythi]

We want to move away from the MCO.

It's not clear why this is the goal. How do you plan to get rid of setting kernel cmdline args for intel_iommu etc?

[uMartinXu]

We want to move away from the MCO.

It's not clear why this is the goal. How do you plan to get rid of setting kernel cmdline args for intel_iommu etc?

To achieve the final bootless goal.
If we can't make the intel_iommu as the default kernel parameter for RHCOS. We will figure out a way and suggest user use this way to set it as the default parameter on day 1 when the user provisions the cluster.

[mythi]

If we can't make the intel_iommu as the default kernel parameter for RHCOS.

It's probably not going to work out because this may need to be modifiable depending on the features users want.

For DSA/IAA, you are already going to need intel_iommu=on,sm_on but some may also want to turn if off intel_iommu=on,sm_off