[coreboot] Bump Coreboot v2 revs in buildrom (was: SimNOW V2 LAB problem)

[Myles Watson]

> Acked-by: Jordan Crouse <jordan.crouse at amd.com>
> 
> I'll throw them all through the test script after you commit to confirm
> sanity.

Thanks.  Rev 197.

Myles