ft2232_spi: prevent use of reserved pins on some programmers

On some programmers an output buffer needs to be enabled by pulling a
gpio high/low. This gpio can not be used for `csgpiol`. Prevent this by
printing an error.

Change-Id: Ied450fa5ef358153adefec3beabc63a62c9f60cd
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/57809
Original-Reviewed-by: Nico Huber <nico.h@gmx.de>
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/71429
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed