ACK: [SRU T/X] Fix KVM cpuid support for spec_ctrl

[Khaled Elmously]

Had to do some reading first to understand some of this.
Looks good to me.

On 2018-01-17 15:31:27 , Stefan Bader wrote:
> The Xenial backport is missing code to actually pass on info
> from the edx register. In Trusty I messed up some details
> (like correctly sorting the table and the non-intuitive 
> ordering in an enum).
> 
> Adding those patches (and building a qemu package which also
> handles the info) I was able to see spec_ctrl enabled inside
> a KVM guest.
> 
> -Stefan
> 
> 
Acked-by: Khalid Elmously  <khalid.elmously at canonical.com>