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

the following patch was just integrated into master:
commit c12e5ae1a5d809a4b74774d28a1c231591400bd3
Author: Matt DeVillier 
Date:   Sun Nov 27 02:19:02 2016 -0600

Add/Combine Haswell Chromebooks using variant board scheme

Combine existing boards google/falco and google/peppy with new
    ChromeOS devices leon and wolf, using their common reference board
    (slippy) as a base.

Chromium sources used:
    firmware-falco_peppy-4389.81.B d7703cac [falco: Add support for Samsung...]
    firmware-leon-4389.61.B ea1bf55 [haswell: Enable 2x Refresh Mode]
    firmware-wolf-4389.24.B 7c5a9c2 [Wolf: haswell: Add small delay before...]

Additionally, some minor cleanup/changes were made:
    - I2C devices set to use ACPI (vs PCI) mode
    - I2C device ACPI entries adjusted as per above
    - I2C devices set to use level (vs edge) interrupt triggering
    - XHCI finalization enabled in devicetree
    - HDA verb entries use simplified macro entry format

Existing google/falco and google/peppy boards will be removed in a
    subsequent commit.

Variant setup modeled after google/beltino

Change-Id: I087df5f98c1bb4ddd0ab24ee9ff786a9d38d87be
    Signed-off-by: Matt DeVillier 
    Reviewed-on: https://review.coreboot.org/17621
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/17621 for details.

-gerrit