google/glados: enable VMX for all variants

Explicitly enable VMX, as some OSes (eg, Windows) need VMX
feature enabled and locked in order to fully support virtualization

Test: boot Windows 10 on google/chell, verify OS reports virtualization
enabled

Change-Id: I53ff575755a9ca376dbf953db96191c17bf57f5f
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/27549
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
7 files changed