cpuid: when ignoring vendor string, ignore it on 0x80000000 too

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
cpuid: another known CPUID difference

The SVM feature leaf is known to change between versions because it was
(incorrectly) non-zero even if SVM was disabled.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Merge pull request #1048 from ehabkost/cpuid-fixes

CPUID config file updates