Enable DPTF flag in ACPI NVS based on devicetree setting for the mainboard. BUG=chrome-os-partner:40635 BRANCH=none TEST=emerge-glaods coreboot Change-Id: I06ec6b050eb83c6a7ee1e48f2bd9f5920f7bfa51 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: 5728a8a37b1a50a483aa211563fb7ad312002ce5 Original-Change-Id: I08d61416c24b3c8857205cf88931f0bb2b38896c Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/297755 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/11565 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>