Patch merged into coreboot/master: mainboard/google/reef: allow variants to modify nhlt oem revision

the following patch was just integrated into master:
commit d0a648e18a7162f7361a13296beb0c1293acb16e
Author: Aaron Durbin 
Date:   Tue Nov 29 23:20:07 2016 -0600

mainboard/google/reef: allow variants to modify nhlt oem revision

In order to mirror the full flexibility of the NHLT library that
    allows a caller to set the OEM revision field in the ACPI header
    modify the variant callback to override the value.

Change-Id: I16e539b350a50e3c163be1439c8637b82e53a759
    Signed-off-by: Aaron Durbin 
    Reviewed-on: https://review.coreboot.org/17651
    Reviewed-by: Furquan Shaikh 
    Tested-by: build bot (Jenkins)

See https://review.coreboot.org/17651 for details.

-gerrit