[coreboot] Fintek SPI driver for Flashrom (unfinished)

[Sean Nelson]

Sean Nelson wrote:
> Fintek SPI Driver file for Flashrom
Thanks to Peter Stuge for help and pushing me to write this SPI code.
The SPI interface is for Fintek F71882 and F71883 SuperIOs. There may be 
other
Fintek SuperIOs that can use this but I havn't checked the available Fintek
datasheets.

Signed-off-by: Sean Nelson <snelson at nmt.edu>
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This code was developed using the datasheets and has not been tested. The
Fintek SPI interface is weird compared to the SB600 and the other SPI
interfaces already found in flashrom.