Add an entry to report the bus clock on bernd's atom laptop.

Add an entry to report the bus clock on bernd's atom laptop.
Intel don't publish the EST voltage tables, and they don't
even publish the MSRs for a shipping processor so we
can figure out how to do this in the backwards highest/lowest
way cleanly.

The mapping might look like the Core * one, but who really knows
for sure outside of a few guys at Intel.  Other machines with
Atom processors and a different bus clock will have to be added
one by one until this stupidity changes.

Tested by bernd, ok gwk