Add Alder Lake support

Loosely based on commit 11680db4 (ichspi: Add Alder Lake support)
on flashrom master.

Beside a little change in descriptor detection, no difference to
Tiger Lake was found. Hence, add new PCI IDs as 500 series.

Change-Id: Icc1278755ff64f03128d8faadbca85a4ff76864d
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/71448
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
3 files changed