Change in coreboot[master]: tpm: Refactor TPM Kconfig dimensions

[Werner Zeh (Code Review)]

Attention is currently required from: Stefan Ott, Felix Singer, Patrick Rudolph, Jonathan Zhang, Nick Vaccaro, Arthur Heymans, Andrey Petrov, Piotr Król, Jes Klinke, Nico Huber, Sean Rhodes, Michał Żygowski, Johnny Lin, Christian Walter, Alexander Couzens, Yu-Ping Wu, Tim Chu, Frans Hendriks, Tristan Corrick, Jeremy Soller, Julius Werner, Angel Pons, Michael Niewöhner, Tim Crawford, Maxim Polyakov, Tim Wawrzynczak.
Werner Zeh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63424 )

Change subject: tpm: Refactor TPM Kconfig dimensions
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Patch Set 6:

(4 comments)

Patchset:

PS6: 
There are additional references to LPC_TPM which we might fix now as well.
 * in Documentation/getting_started/kconfig.md
 * in src/drivers/pc80/tpm/tis.c (this one might be to heavy for this patch though, so up to you).

File src/drivers/pc80/tpm/Kconfig:

https://review.coreboot.org/c/coreboot/+/63424/comment/24c08ebc_449a4349 
PS6, Line 5: LPC
If we are touching it now I would get rid if 'LPC' completely. As Michael mentioned already a modern memory mapped TPM is often physically attached via SPI. LPC is just confusing here given that it is not even available on recent chipsets any more.

File src/mainboard/siemens/mc_apl1/variants/mc_apl2/gpio.c:

https://review.coreboot.org/c/coreboot/+/63424/comment/16b1a8a2_286b41b8 
PS6, Line 594: 	/* CLK_25M_MEMORY_MAPPED_TPM_CPU */
> You probably don't want to replace this.

Yes, plese skip this one.

File src/soc/intel/apollolake/Kconfig:

https://review.coreboot.org/c/coreboot/+/63424/comment/a9babd2e_a9efd1ea 
PS6, Line 155: TPM part is conntected on Fast SPI interface, but the LPC MMIO
             : 	 TPM transactions are decoded and serialized over the SPI interface.
Maybe rephrase this to get rid of the 'LPC' part as well? Something like:

"TPM part is conntected on Fast SPI interface and is mapped to the linear address space"