[L] Change in coreboot[main]: security/tpm: resolve conflicts in TSS implementations

[Sergii Dmytruk (Code Review)]

Attention is currently required from: Christian Walter, Erik van den Bogaert, Felix Held, Frans Hendriks, Fred Reitberger, Jason Glenesk, Julius Werner, Krystian Hebel, Martin L Roth, Matt DeVillier, Michał Żygowski, Raul Rangel, Yu-Ping Wu.

Sergii Dmytruk has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69160?usp=email )

Change subject: security/tpm: resolve conflicts in TSS implementations
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Patch Set 34:

(1 comment)

File src/security/tpm/tss.h:

https://review.coreboot.org/c/coreboot/+/69160/comment/64d0b94f_94879538 :
PS33, Line 40: #define TLCL_CALL(name, ...) do {                             \
> Actually, looking at this again, is there maybe a way we could optimize this further? Right now I do […]

I think you're right, compiler has no way of knowing value of an `extern` variable.  Updated.