Change in coreboot[master]: ec/acpi: add mechanisms to clear EC output queue

[build bot (Jenkins) (Code Review)]

build bot (Jenkins) has posted comments on this change. ( https://review.coreboot.org/22180 )

Change subject: ec/acpi: add mechanisms to clear EC output queue
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Patch Set 21:

Build Successful

https://qa.coreboot.org/job/coreboot-checkpatch/17844/ : SUCCESS

https://qa.coreboot.org/job/coreboot-gerrit/62864/ : SUCCESS