[flashrom] [Patch] Preliminary general superio support.

[Luc Verhaegen]

Very untested and new. Sent in to show off what is being worked on and 
to get first impressions.

Last i tried it worked fine on:
* Winbond W83627EHF on MSI Fuzzy CN700 (nothing needed, just detection).
* Winbond W83697HF on Asus 7V8X-MX SE (needing superio rom write enable)

To be tested still:
* it8705F rom write enable (have shuttle board here that i should still 
test on).
* it87 spi code (have nonspi board here that i should still test on).

Luc Verhaegen.