Add support for MX25R6435F

Change-Id: I664ffce6f9aa7544e17b516a1b4179d561208b2f
Signed-off-by: Nathan Rennie-Waldock <nathan.renniewaldock@gmail.com>
Reviewed-on: https://review.coreboot.org/28004
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Nico Huber <nico.h@gmx.de>
2 files changed