Patch merged into coreboot/master: ec/acpi: Add missing include

the following patch was just integrated into master:
commit 8a9b7b59e3ddae3991530d50374b0fc0dd1d896a
Author: Nico Huber 
Date:   Tue Oct 25 16:03:22 2016 +0200

ec/acpi: Add missing include

Change-Id: I61c2191f28b6c2c9a6bc587dc3b6c2ae28205192
    Signed-off-by: Nico Huber 
    Reviewed-on: https://review.coreboot.org/17124
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See https://review.coreboot.org/17124 for details.

-gerrit