[coreboot-gerrit] Patch merged into coreboot/master: google/chromeos: disable platform hierarchy on resume for TPM2

the following patch was just integrated into master:
commit f56c7787ba34bf9ee7799a77803c1a77b2d1be27
Author: Aaron Durbin 
Date:   Tue Jan 10 17:44:42 2017 -0600

google/chromeos: disable platform hierarchy on resume for TPM2

On Chrome OS devices that use TPM2 parts the platform hierarchy
    is disabled by the boot loader, depthcharge. Since the bootloader
    isn't involved in resuming a suspended machine there's no equivalent
    action in coreboot to disable the platform hierarchy. Therefore, to
    ensure consistent state in resume the platform hierarchy in the TPM2
    needs to be disabled as well. For systems that resume using the
    firmware the platform hierarchy is disabled when utilizing
    TPM2 devices.

BUG=chrome-os-partner:61097
    BRANCH=reef
    TEST=Suspend and resume. Confirmed 'stop trunksd; tpmc getvf; start
    trunksd' shows that phEnable is 0.

Change-Id: I060252f338c8fd68389273224ee58caa99881de8
    Signed-off-by: Aaron Durbin 
    Reviewed-on: https://review.coreboot.org/18096
    Tested-by: build bot (Jenkins)
    Reviewed-by: Paul Menzel 
    Reviewed-by: Duncan Laurie

See https://review.coreboot.org/18096 for details.

-gerrit