Change in coreboot[master]: soc/intel/cmn/{block, pch}: Migrate GPMR driver

[Wonkyu Kim (Code Review)]

Attention is currently required from: Subrata Banik, Ravishankar Sarawadi, Angel Pons, Nick Vaccaro, Tim Wawrzynczak.
Wonkyu Kim has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63471 )

Change subject: soc/intel/cmn/{block, pch}: Migrate GPMR driver
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Patch Set 13:

(1 comment)

File src/soc/intel/common/pch/lockdown/lockdown.c:

https://review.coreboot.org/c/coreboot/+/63471/comment/354a0098_883b116e 
PS13, Line 40: gpmr_or32(GPMR_GCS, GPMR_GCS_BILD);
             : 
             : 	/*
             : 	 * Set Secure Register Lock (SRL) bit in DMI control register to lock
             : 	 * DMI configuration.
             : 	 */
             : 	gpmr_or32(GPMR_DMICTL, GPMR_DMICTL_SRLOCK);
> Does MTL have these registers in MCHBAR?

Yes.