[M] Change in coreboot[main]: lib/{fit,fit_payload}.c: Enhance support for FIT images

[Benjamin Doron (Code Review)]

Attention is currently required from: Felix Held, Julius Werner, Lean Sheng Tan, Matt DeVillier, Maximilian Brune.

Benjamin Doron has posted comments on this change by Benjamin Doron. ( https://review.coreboot.org/c/coreboot/+/84796?usp=email )

Change subject: lib/{fit,fit_payload}.c: Enhance support for FIT images
......................................................................

Patch Set 5:

(1 comment)

File src/lib/fit.c:

https://review.coreboot.org/c/coreboot/+/84796/comment/3619dc1d_c675ede9?usp... :
PS4, Line 519: 				dt_find_bin_prop(node, "size", &firmware_size, &unused_prop_size);
> I don't know where this is specced, but if it follows device tree principles it probably also needs  […]

It's likely a UPL customisation, and I'm now implementing this a different way.