[M] Change in coreboot[main]: cpu/intel/model_206ax: Only use supported C-states

[Patrick Rudolph (Code Review)]

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Hello Paul Menzel, build bot (Jenkins),

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

https://review.coreboot.org/c/coreboot/+/78194?usp=email

to look at the new patch set (#2).

The following approvals got outdated and were removed:
Code-Review+1 by Paul Menzel, Verified+1 by build bot (Jenkins)

Change subject: cpu/intel/model_206ax: Only use supported C-states
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cpu/intel/model_206ax: Only use supported C-states

When advertising C-state using the ACPI _CST object, make sure
to only advertise those that are supported by the CPU.
Downgrade if it's not and make sure to not advertise duplicate
states.

Add debug prints for the finally selected mapping of ACPI
C-state vs Intel CPU C-state.

Test: Tested on Lenovo X220.
      All C-states are still advertised as all are supported.

Change-Id: Iaaee050e0ce3c29c12e97f5819a29f485a7946c2
Signed-off-by: Patrick Rudolph 
---
M src/cpu/intel/model_206ax/acpi.c
1 file changed, 57 insertions(+), 5 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/94/78194/2