Change in flashrom[master]: Add Tiger Lake U Premium support

[Nico Huber (Code Review)]

Attention is currently required from: Tim Crawford, Michał Żygowski, David Hendricks.
Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/55578 )

Change subject: Add Tiger Lake U Premium support
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Patch Set 13:

(1 comment)

File ich_descriptors.c:

https://review.coreboot.org/c/flashrom/+/55578/comment/8ae227ef_04a939a4 
PS13, Line 1016: 		if (content->CSSL != 0x11)
AIUI, David's wants an explicit check+return for each platform. So this should become
something like

if (...)
            return TIGER_POINT;
    warn;
    return TIGER_POINT;