Extend the cpuid package to parse and emulate cpuid features that exist
only on AMD and not Intel. The least straightforward part of this is
that AMD duplicates several block 1 features in block 6. Thus we ignore
those features when parsing block 6 and add them when emulating.
PiperOrigin-RevId: 218935032
Change-Id: Id41bf1c24720b0d9b968e2c19ab5bc00a6d62bd4