[flashrom] [PATCH] Add atapromise programmer

[Joseph Lehner]

This patch adds a new programmer that supports (admittedly ancient) Promise ATA
controllers. I've successfully tested this on an Ultra100 controller I had lying
around. Mine uses a 128 kB MX29F001T flash chip, but I was not able to write
anything past the first page (32 kB), which is not that much of a problem, since the
option ROM files for these controllers are only 16 kB).

It uses a (dirty?) hack to limit the chip size to 16 kB (so you can flash unmodified
images) and provides an "allow32k=y" option, allowing you to flash larger images.

Signed-off-by: Joseph C. Lehner