flashchips: Mark GigaDevice GD25B128B/GD25Q128B as tested

Alexander reported this chip as tested using a GD25B128CPIG (same device
ID, apparently) on 2018-08-30 via the mailing list. The chip name is
updated as well.

Change-Id: I134d3816c0f02e20764ab132a01bcba9f4e93f0d
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/28810
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
1 file changed