Patch merged into coreboot/master: vendorcode/google/chromeos: zero out SHARED_DATA region

the following patch was just integrated into master:
commit 0803ba47a418ccbe26913f7b7600313d650891de
Author: Patrick Georgi 
Date:   Wed Dec 7 12:12:59 2016 +0100

vendorcode/google/chromeos: zero out SHARED_DATA region

BUG=chromium:595715
    BRANCH=none
    TEST=/build/$board/firmware/coreboot.rom has a zeroed out SHARED_DATA
    region if it exists.

Change-Id: Ib1e6fd62bcf987872890c6d155287dcedb0b1f40
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: e8a88bf744f44d034f8606a556014e2bee37eda1
    Original-Change-Id: I0b59f1f0e2f8645000f83cb3ca7f49e4da726341
    Original-Signed-off-by: Patrick Georgi 
    Original-Reviewed-on: https://chromium-review.googlesource.com/417821
    Original-Commit-Ready: Patrick Georgi 
    Original-Tested-by: Patrick Georgi 
    Original-Reviewed-by: Stefan Reinauer 
    Reviewed-on: https://review.coreboot.org/17789
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/17789 for details.

-gerrit