Fix for pcode timeouts on BXT and GLK, cmdparser fixes and fixes

for new vbt version on CFL and CNL.

GVT contains vGPU reset enhancement, which refines vGPU reset flow
and the support of virtual aperture read/write when x-no-mmap=on
is set in KVM, which is required by a test case from Redhat and
also another fix for virtual OpRegion.
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