flashchips: Add Winbond 25Q40EW and rename 25Q40.W

Same story as for 25Q80BW/EW, 25Q40EW has a new ID and the only known
chip with the old ID is the BW variant.

Change-Id: Ib610b0d6f3a5561b2ac3505ef15bdee8b0edae25
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/25462
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
2 files changed