Change in coreboot[master]: src/drivers/intel/fsp2_0: allow larger FSP 2.0 header

[Martin Roth (Code Review)]

Attention is currently required from: Michał Żygowski, Furquan Shaikh, Marshall Dawson, Subrata Banik, Nikolai Vyssotski, Andrey Petrov, Patrick Rudolph, Nathaniel L Desimone.
Martin Roth has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/56190 )

Change subject: src/drivers/intel/fsp2_0: allow larger FSP 2.0 header
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Patch Set 3:

(1 comment)

File src/drivers/intel/fsp2_0/include/fsp/info_header.h:

https://review.coreboot.org/c/coreboot/+/56190/comment/c099fc66_261a8626 
PS2, Line 13:  however, some FSP 2.0 variants have it as well.
> The FSP header revision field may also be looked at to check what size to expect. […]

I think the real solution is a fix from intel, either to EDK2 or the FSP spec. Until that happens though, I think we need a solution for the current situation.

Maybe we put a TODO here? 
Furquan, would you rather a fix in our version of the EDK?  I don't like that solution as much in general, because then Intel's FSPs built from the 202011 wouldn't work with coreboot, but I'm open to ideas.