[coreboot-gerrit] Patch merged into coreboot/master: google/chromeec: implement vboot_(save|retrieve)_hash API

the following patch was just integrated into master:
commit 49b2383ddb14f479cd2a5d1e01b1378810e8108e
Author: Aaron Durbin 
Date:   Fri Jan 22 14:42:54 2016 -0600

google/chromeec: implement vboot_(save|retrieve)_hash API

For x86 systems which resume through the reset vector one needs to
    ensure the the RW slot taken at resume time matches the one at
    boot time. To that end, allow Chrome OS EC to supply the plumbing
    to vboot for storing and retrieving the RW slots' hash digest
    using the vstore backend.

BUG=chrome-os-partner:46049
    BRANCH=glados
    TEST=Suspended and resumed on chell. Also, tested with an EC build
         which returns a bad hash to ensure that is properly caught.

Change-Id: Ib056f7e6b3386447ed1ff95c740ef5b4544f9049
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: 9c78546b1d6298a4c397a587c564df6d9d097e75
    Original-Change-Id: I86c96a4092deab2dfa51b3043b9dba16b6a4c201
    Original-Signed-off-by: Aaron Durbin 
    Original-Reviewed-on: https://chromium-review.googlesource.com/323502
    Original-Reviewed-by: Patrick Georgi 
    Original-Reviewed-by: Duncan Laurie 
    Reviewed-on: https://review.coreboot.org/13577
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See https://review.coreboot.org/13577 for details.

-gerrit