Change in coreboot[master]: soc/intel/common: add generic gpio lock mechanism

[Tim Wawrzynczak (Code Review)]

Attention is currently required from: Bora Guvendik, Caveh Jalali, Selma Bensaid, Maulik V Vaghela, Subrata Banik, Nick Vaccaro, Patrick Rudolph, Karthik Ramasubramanian.
Tim Wawrzynczak has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58351 )

Change subject: soc/intel/common: add generic gpio lock mechanism
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Patch Set 10:

(3 comments)

File src/soc/intel/common/block/smm/Kconfig:

https://review.coreboot.org/c/coreboot/+/58351/comment/2cdec307_16a20fa1 
PS10, Line 15: 
suggestion: add a little bit more here about the fact that the SoC can provide
a list of GPIOs and/or the mainboard can provide a list of GPIOs.

File src/soc/intel/common/block/smm/smihandler.c:

https://review.coreboot.org/c/coreboot/+/58351/comment/5ba37fe4_7426a19a 
PS1, Line 348: gpio_lock_pad
> Ok I cherry-picked this latest one into my tree and timed it with the stopwatch API and the whole fu […]

Ack

File src/soc/intel/common/block/smm/smihandler.c:

https://review.coreboot.org/c/coreboot/+/58351/comment/f6662353_053a901f 
PS10, Line 375:  controllable by a non-host controller
I'd leave this part out, other people might have other reasons for wanting to lock GPIOs.