Patch merged into coreboot/master: Add/Combine Broadwell Chromebooks using variant board scheme

the following patch was just integrated into master:
commit 45e11aa0a573aba1e4d8ae8dcd2cc87a8ca87dab
Author: Matt DeVillier 
Date:   Sun Dec 18 11:59:58 2016 -0600

Add/Combine Broadwell Chromebooks using variant board scheme

Combine existing boards google/auron_paine and google/samus with new
    ChromeOS devices auron_yuna, gandof and lulu, using their common
    reference board (auron) as a base.

Chromium sources used:
    firmware-yuna-6301.59.B 6ed8b9d [CHERRY-PICK: broadwell: Update to...]
    firmware-gandof-6301.155.B 666f34f [gandof: modify power limiting for...]
    firmware-lulu-6301.136.B 8811714 [lulu: update RAMID table]

Additionally, some minor cleanup/changes were made:
     - I2C devices set to use level (vs edge) interrupt triggering
     - HDA verb entries use simplified macro entry format
     - correct FADT table header version
     - remove unused ACPI device entries / .asl file(s)
     - clean up ACPI code (e.g., trackpad on Lulu)
     - adjust _CID for trackpad on Lulu in order to not load non-functional
        Windows driver (does not affect Linux)
     - remove unused header includes (multiple/various)
     - correct I2C addresses used for SMBIOS device entries
     - correct misc typos etc

The existing auron_paine samus boards are removed.

Variant setup modeled after google/slippy

Change-Id: I53436878d141715eb18b8ea5043d71e6e8728fe8
    Signed-off-by: Matt DeVillier 
    Reviewed-on: https://review.coreboot.org/17917
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/17917 for details.

-gerrit