Add MX25U6435 SPI flash device

MX25U6435 is defined in flashchip.h.
But read/write and write protection area are not implemented.
To use MX25U6435, we need to implement functions.

BUG=chrome-os-partner:31401
TEST=read and write coreboot on winky whith Macronix device.

Change-Id: I16be1893b5d35fe7edc1fd79809eb86111a5d341
Reviewed-on: https://chromium-review.googlesource.com/212890
Reviewed-by: Jongpil Jung <jongpil19.jung@samsung.com>
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Commit-Queue: Jongpil Jung <jongpil19.jung@samsung.com>
Tested-by: Jongpil Jung <jongpil19.jung@samsung.com>
(cherry picked from commit 66a96497c0b57d6d57f09235f00d4ff84c4879e0)
Reviewed-on: https://chromium-review.googlesource.com/224891
Reviewed-by: Gediminas Ramanauskas <gedis@chromium.org>
2 files changed