Change in coreboot[master]: soc/intel/common: Implement power-failure-state handling

[Nico Huber (Code Review)]

Hello Patrick Rudolph, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/34728

to look at the new patch set (#5).

Change subject: soc/intel/common: Implement power-failure-state handling
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soc/intel/common: Implement power-failure-state handling

This is a consolidation of the respective feature in `soc/intel/*lake/`,
including additional support for MAINBOARD_POWER_STATE_PREVIOUS.

For the latter, firmware has to keep track of the `previous` state. The
feature was already advertised in Kconfig long ago, but not implemented.

SoC code has to call pmc_set_power_failure_state() at least once during
boot and needs to implement pmc_soc_set_afterg3_en() for the actual
register write.

Change-Id: I22bd71e4f3b67309c1aa0cb6faeb5959521bf656
Signed-off-by: Nico Huber 
---
M src/soc/intel/common/block/include/intelblocks/pmclib.h
M src/soc/intel/common/block/pmc/pmclib.c
2 files changed, 45 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/28/34728/5