CPUID: removed from CrissCross

If you need a nice CPUID decoder, use my CPUID tool:

    http://github.com/tycho/cpuid

The implementation being removed by this commit was buggy, incomplete, and
a bear to maintain. I'm dropping it so people don't use it thinking it's doing
something sane.

Signed-off-by: Steven Noonan <steven@uplinklabs.net>