Change in coreboot[master]: security/intel/txt: Set up TPM in bootblock if using measured boot

[Philipp Deppenwiese (Code Review)]

Attention is currently required from: Patrick Rudolph, Arthur Heymans.
Philipp Deppenwiese has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/52969 )

Change subject: security/intel/txt: Set up TPM in bootblock if using measured boot
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Patch Set 1: Code-Review+2