[coreboot] PATCH: Add Spansion S25FL016A to flashrom

[Peter Stuge]

I put a Spansion chip on a m57sli. This patch lets flashrom read the
chip successfully. Writing is inconsistent.

I've done two writes so far. Writing takes several minutes and I
don't get any progress messages from flashrom.

The first run was 4*coreboot.rom and that booted right away with VGA
and all. Yay! The read back file matched the original file.

Then I wrote rand.bin which is 2MB of /dev/random. This consistently
reads back as something quite different from the original. See 8MB
diff at http://stuge.se/m57sli/s25fl016a.diff (rand.bin and back.bin
are there too)

//Peter