Patch merged into coreboot/master: vboot: Add mock functions for recovery space read/write

the following patch was just integrated into master:
commit 775765eaf30a6e3cef6e49f4119967a09841c214
Author: Furquan Shaikh 
Date:   Thu Jan 26 15:33:01 2017 -0800

vboot: Add mock functions for recovery space read/write

For the boards that intend to use mock tpm and have recovery mrc cache
    support enabled, provide mock functions to read and write mrc hash
    space.

Reading MRC hash space returns TPM_SUCCESS as later checks take care of
    comparing the hash value and retraining if hash comparison fails. Thus,
    in case of mock tpm, device would always end up doing the memory
    retraining in recovery mode.

BUG=chrome-os-partner:62413
    BRANCH=None
    TEST=Verified that eve builds with mock tpm selected.

Change-Id: I7817cda7821fadeea0e887cb9860804256dabfd9
    Signed-off-by: Furquan Shaikh 
    Reviewed-on: https://review.coreboot.org/18248
    Tested-by: build bot (Jenkins)
    Reviewed-by: Duncan Laurie

See https://review.coreboot.org/18248 for details.

-gerrit