[PATCH for review] Add temperature-tracking mode to f71805f driver

[phil_lftzl_endecott at chezphil.org (Phil Endecott)]

A couple of things I should have said:

- Ooops, I did the diff from the hwmon directory.  I'll try to get that 
right next time.

- Could someone please look at how this interacts with the F71872F/FG ?


Thanks,

Phil.