layout: Tidy up the include-args API

Move all forward declarations into `layout.h`, use consistent naming.

Change-Id: I0e87c9d91b9bc4d78f9cee98caff6985803f7be7
Signed-off-by: Nico Huber <nico.h@gmx.de>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/54287
Original-Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Original-Reviewed-by: Anastasia Klimchuk <aklm@chromium.org>
Original-Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/72223
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
4 files changed