Add mx25l6495f support

This is mostly ported from code sent to the flashrom mailing list
by Alex Lu (http://patchwork.coreboot.org/patch/4245/). I updated
it to use the generic write-protect scheme instead of the Winbond-
scheme.

BUG=none
BRANCH=none
TEST=Tested read, write, and write-protect commands using Dediprog

Change-Id: Iee77b70bebe6dc7e15a60113cd309c7f75133a00
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/229697
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
3 files changed