reoder letters to fix piles-o'-typos

- Fix error handling code.
- Change some function names to conform with Core Duo names.
- Correct hadnling of the functions that need non-zero Unit Mast specification.
- Some other random cleanup.

more unification between amd64 and i386 (API changes, but we think
noone else uses this acpi except the command); from Mike Belopuhov

replacement for the pctr codebase that can handle amd64 processors as
well (in fact, all 4 combinations of codebase and processor) written by
Mike Belopuhov and Aleksey Lomovtsev