[M] Change in coreboot[master]: sb/intel/common/pmutil: Add and use method to switch sleep state

[Stefan Reinauer (Code Review)]

Stefan Reinauer has abandoned this change. ( https://review.coreboot.org/c/coreboot/+/27774?usp=email )

Change subject: sb/intel/common/pmutil: Add and use method to switch sleep state
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Abandoned

Almost 5 years and does not apply anymore. Rebase and reupload if still relevant