Change in coreboot[master]: security/intel/txt/romstage.c: Unlock memory when SCLEAN not needed

[Angel Pons (Code Review)]

Attention is currently required from: Michał Żygowski, Patrick Rudolph.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59521 )

Change subject: security/intel/txt/romstage.c: Unlock memory when SCLEAN not needed
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Patch Set 3:

(1 comment)

File src/security/intel/txt/romstage.c:

https://review.coreboot.org/c/coreboot/+/59521/comment/cd2ceb77_41595682 
PS3, Line 138: 		wrmsr(TXT_UNLOCK_MEMORY_MSR, msr);
> I wasn't aware of the existence of the code under src/northbridge/intel/sandybridge/raminit.c […]

I'm pretty sure pre-SNB platforms don't have the MSR, and the code for newer platforms already writes the MSR as part of raminit (be it native raminit, MRC or FSP).