[M] Change in coreboot[main]: [RFC] region: Introduce region_create() functions

[Nico Huber (Code Review)]

Attention is currently required from: Andrey Petrov, Julius Werner, Jérémy Compostella, Martin L Roth, Maximilian Brune, Ronak Kanabar.

Nico Huber has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/79905?usp=email )

Change subject: [RFC] region: Introduce region_create() functions
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Patch Set 6:

(1 comment)

File util/cbfstool/cbfstool.c:

https://review.coreboot.org/c/coreboot/+/79905/comment/701b9692_270a27e2 :
PS1, Line 334: 	if (region_create_untrusted(
> > They're parsed via `strtol()` so they already cannot overflow a `size_t`. […]

Was a bit too focused on the types with that answer. And sorry for
going grumpy.

We should also check the sum of those numbers Which isn't the case
at the moment, AFAICS?