remove the nvlink2 pci_vfio subdriver v2

[Christoph Hellwig]

On Tue, May 04, 2021 at 02:59:07PM +0200, Greg Kroah-Hartman wrote:
> > Hi Christoph,
> > 
> > FYI, these uapi changes break build of QEMU.
> 
> What uapi changes?
> 
> What exactly breaks?
> 
> Why does QEMU require kernel driver stuff?

Looks like it pull in the uapi struct definitions unconditionally
instead of having a local copy.  We could fix that by just putting
them back, but to me this seems like a rather broken configuration
in qemu when it pulls in headers from the running/installed kernel
without any feature checks before using them.