Java VM uses this to determine if the CPU is new enough to be a 486 or
newer.
Also fixes some comment text.
Java VM scans all the leafs for hypervisor entries
Instead of adding directly which was causing our CPUID map to grow to
1500 entries.
Do the correct CPUID thing and return zeroes for non-understood leafs.
Gives us the same result since we cover almost all leaves with it anyway