flashchips: Add W25Q256.W

Nicklas Lennert wrote me via the flashrom mailing list that
he successfully ran read, write and verify cmd.

Signed-off-by: Simon Buhrow <simon.buhrow@posteo.de>
Change-Id: I3608945a38b5ed42b8b2b9b2b388cdea97141d7b
Reviewed-on: https://review.coreboot.org/c/flashrom/+/40855
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
2 files changed