- Don't add offsets, they are added automatically by the chip.
- Make sure to read all registers with MSBs after reading from
the extended resoltion register, otherwise they stay locked.
This makes mbmon actually work on Asus S2882-D Opteron server
motherboards with the ADM1027 chip, using amdpm(4) + smb(4).
(Except it doesn't show the 4th FAN RPM counter; fix not
committed at this time.)
In collaboration with: Vsevolod Lobko
e78bd3f118