Change in coreboot[master]: soc/intel/skylake: Enable power button SMI when jumping to payload

[Furquan Shaikh (Code Review)]

Hello build bot (Jenkins),

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

https://review.coreboot.org/21082

to look at the new patch set (#3).

Change subject: soc/intel/skylake: Enable power button SMI when jumping to payload
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soc/intel/skylake: Enable power button SMI when jumping to payload

Instead of enabling power button SMI unconditionally, add a boot state
handler to enable power button SMI just before jumping to
payload. This ensures that:
1. We do not respond to power button SMI until we know that coreboot
is done.
2. On resume, there is no need to enable power button SMI. This avoids
any power button presses during resume path from triggering a
shutdown.

BUG=b:64811381

Change-Id: Icc52dc0103555602c23e09660bc38bb4bfddbc11
Signed-off-by: Furquan Shaikh 
---
M src/soc/intel/skylake/include/soc/pm.h
M src/soc/intel/skylake/pmutil.c
M src/soc/intel/skylake/smi.c
M src/soc/intel/skylake/smihandler.c
4 files changed, 32 insertions(+), 4 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/82/21082/3