Change in flashrom[master]: Add support for Intel Emmitsburg PCH

[David Hendricks (Code Review)]

Attention is currently required from: Arthur Heymans, Nico Huber, David Hendricks, Edward O'Callaghan, Angel Pons.
Hello Arthur Heymans, build bot (Jenkins), Nico Huber, Jonathan Zhang, Edward O'Callaghan, Angel Pons, Angel Pons,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/flashrom/+/57635

to look at the new patch set (#3).

Change subject: Add support for Intel Emmitsburg PCH
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Add support for Intel Emmitsburg PCH

This patch does the following:
- Add PCIe ID for Intel Emmitsburg PCH
- Add ICH descriptor check for CHIPSET_C620_SERIES_LEWISBURG. Although
  EBG only uses 80 for its PSL value, LBG on Purley and Whitley use
  139. So to cover both cases the latter is used.

TESTED=tried on different servers with Intel Emmitsburg PCH, flash
update was successful. Some servers have flash chip installed, another
one has em100 emulator connected.

Change-Id: I1edae9163b910c3831adc82c90840fa965479451
Signed-off-by: Jonathan Zhang 
Signed-off-by: David Hendricks 
---
M chipset_enable.c
M ich_descriptors.c
2 files changed, 6 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/35/57635/3