Change in coreboot[master]: security/tpm/crtm: Add a function to measure the bootblock on SoC level

[Werner Zeh (Code Review)]

Attention is currently required from: Jason Glenesk, Raul Rangel, Marshall Dawson, Christian Walter, Arthur Heymans, Fred Reitberger, Andrey Petrov, Felix Held.
Werner Zeh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/64492 )

Change subject: security/tpm/crtm: Add a function to measure the bootblock on SoC level
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Patch Set 5:

(1 comment)

File src/soc/amd/common/block/cpu/noncar/bootblock_measure.c:

https://review.coreboot.org/c/coreboot/+/64492/comment/6de52b27_a68c977f 
PS5, Line 5: int tspi_soc_measure_bootblock(int pcr_index)
           : {
           : 	return 1;
           : }
> Nit: Add a TODO comment. […]

I just followed the logic that is used in crtm.c. Here, if the measurement function 'tpm_measure_region()' returns with non-zero, this is treated as error. I think we should be consistent here.