Simplify cpu_number() - adding a shortcut depending upon the board type actually slows things down in every case.
Simplify cpu_number() - adding a shortcut depending upon the board type
actually slows things down in every case.

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars