Add support for AT25DF021A

This is the low-voltage version of the AT25DF021. Tested with FT2232H
Mini Module

Change-Id: If4990e6856c8b77567ef4218459cf754b9c6bc57
Signed-off-by: Steffen Mauch <steffen.mauch@gmail.com>
Reviewed-on: https://review.coreboot.org/26856
Reviewed-by: David Hendricks <david.hendricks@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2 files changed