[S] Change in flashrom[main]: ichspi: Add RaptorPoint PCH support

[Michał Żygowski (Code Review)]

Attention is currently required from: Anastasia Klimchuk, Krystian Hebel, Maciej Pijanowski, Michał Kopeć, Sergii Dmytruk.

Michał Żygowski has posted comments on this change by Maciej Pijanowski. ( https://review.coreboot.org/c/flashrom/+/83854?usp=email )

Change subject: ichspi: Add RaptorPoint PCH support
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Patch Set 4:

(3 comments)

Patchset:

PS3:
> Could you please add this to document `/release_notes/devel. […]

Added

PS3:
> Thank you for adding support! […]

Added the relevant datasheet to the commit message.

Yes, we have been flashing SPI on Z790 chipset for quite some time, no problems detected.

File util/ich_descriptors_tool/ich_descriptors_tool.c:

https://review.coreboot.org/c/flashrom/+/83854/comment/44876621_4f1d6ce4?usp... :
PS3, Line 142: "\t- "600" or "alder" for Intel's 600 series chipsets.\n"
> Could you please add raptor here? And then run the tool, select this new option, and add the result  […]

Added the missing raptor.