[M] Change in flashrom[main]: ichspi: Add support for C740 PCH

[Patrick Rudolph (Code Review)]

Attention is currently required from: Kyösti Mälkki, Patrick Georgi, Patrick Rudolph.

Hello Patrick Georgi, Patrick Rudolph, build bot (Jenkins),

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

https://review.coreboot.org/c/flashrom/+/78186?usp=email

to look at the new patch set (#4).

Change subject: ichspi: Add support for C740 PCH
......................................................................

ichspi: Add support for C740 PCH

Clean commit 51e1d0e4b7670e5822560acc724a6a8dd00b6af4
'Add support for Intel Emmitsburg PCH' which broke
CHIPSET_5_SERIES_IBEX_PEAK detection and which assumes C740 is the same
as C620, while its more a close relative to Intel's H570 PCH.

Based on Intel SPI Programming Guide #619386.

Test: Run on Intel ArcherCity CRB with Intel's C741 PCH
      using the 'internal' programmer.
Test: Run on BMC and accessed the SPI flash chip over
      'linux_mtd' programmer.
Change-Id: I80eebc0fcc14de9df823aceaee77870ad136f94a
Signed-off-by: Patrick Rudolph 
---
M chipset_enable.c
M ich_descriptors.c
M ichspi.c
M include/programmer.h
4 files changed, 42 insertions(+), 8 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/86/78186/4