Patch merged into coreboot/master: mainboard/google/reef: add board SKU'ing support

the following patch was just integrated into master:
commit 2b3a6bee77b3fcff721a6c7d34b3316a338bf1cb
Author: Aaron Durbin 
Date:   Wed Dec 7 17:34:06 2016 -0600

mainboard/google/reef: add board SKU'ing support

There are 2 gpios on reef-like boards that can be composed
    into a SKU. Add support for identifying the SKU value using
    the base 3 gpio logic. Also export the SKU information to the
    SMBIOS type 1 table.

BUG=chrome-os-partner:59887,chrome-os-partner:60494
    BRANCH=reef

Change-Id: I8bb94207b0b7833d758054a817b655e248f1b239
    Signed-off-by: Aaron Durbin 
    Reviewed-on: https://review.coreboot.org/17771
    Tested-by: build bot (Jenkins)
    Reviewed-by: Furquan Shaikh 
    Reviewed-by: Paul Menzel

See https://review.coreboot.org/17771 for details.

-gerrit