This is a small set of patches for the i801 I2C driver that are
mostly cleanups and consolidation.  No real behaviour change, except
not enabling PEC when it's not needed.

I have tested these pretty extensively on qemu with various configurations
and errors (I've hacked up qemu a bit to do this) and it seems to be ok.

Not sure if you are interested, but thought I would offer.

-corey