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

[David Hendricks (Code Review)]

Attention is currently required from: Arthur Heymans, Jonathan Zhang, Johnny Lin, Christian Walter, Edward O'Callaghan, David Hendricks, Deomid "rojer" Ryabkov, Tim Chu.
David Hendricks has uploaded a new patch set (#2) to the change originally created by Jonathan Zhang. ( https://review.coreboot.org/c/flashrom/+/54965 )

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
- Based on ICH descriptor content, choose CHIPSET_C620_SERIES_LEWISBURG
  if ISL/PSL is 80.

TESTED=tried on a server with Intel Emmitsburg PCH, flash update
was successful. This server, however, does not have flash chip
installed, it instead has em100 emulator connected.

Change-Id: I2a1bb7467e693d1583aa885fa0e277075edd4a3e
Signed-off-by: Jonathan Zhang 
Signed-off-by: David Hendricks 
---
M chipset_enable.c
M ich_descriptors.c
2 files changed, 3 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/65/54965/2