Change in coreboot[master]: soc/intel/alderlake: Add support to update descriptor at runtime

[Reka Norman (Code Review)]

Attention is currently required from: Reka Norman, Tim Wawrzynczak, Rizwan Qureshi, Sridhar Siricilla, Angel Pons.
Hello Sam McNally, build bot (Jenkins), Reka Norman, Kangheui Won, Rizwan Qureshi, Tim Wawrzynczak, Sridhar Siricilla, Angel Pons, Eric Lai,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/63365

to look at the new patch set (#8).

Change subject: soc/intel/alderlake: Add support to update descriptor at runtime
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soc/intel/alderlake: Add support to update descriptor at runtime

On nereid, we need to update the descriptor based on fw_config (see
the follow-up patch), so add support to update the descriptor at
runtime. This is a temporary workaround while we find a better solution.

This is basically adding back the configure_pmc_descriptor() function
removed in CB:63339, just making it generic and allowing it to update
multiple bytes at once.

BUG=b:226848617
TEST=With the following patch, Type-C and HDMI work on nereid.

Change-Id: I43c4d2888706561e42ff6b8ce0377eedbc38dbfe
Signed-off-by: Reka Norman 
---
M src/soc/intel/alderlake/Kconfig
M src/soc/intel/alderlake/Makefile.inc
A src/soc/intel/alderlake/bootblock/update_descriptor.c
M src/soc/intel/alderlake/include/soc/bootblock.h
4 files changed, 107 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/65/63365/8