[coreboot-gerrit] Patch merged into coreboot/master: bootstate: add arch specific hook at coreboot exit

the following patch was just integrated into master:
commit 16bd2676ce1dcec342de19640c45bd7216ba70f1
Author: Aaron Durbin 
Date:   Wed Dec 7 11:58:20 2016 -0600

bootstate: add arch specific hook at coreboot exit

The bootstate machine allows one to schedule work at the
    boundaries of each state. However, there are no priorities by
    design. As such if there are things that need to be performed
    that are interdependent between callbacks there's no way to
    do that aside from explicitly putting the call in one of the
    callbacks.

This situation arises around BS_OS_RESUME, BS_PAYLOAD_LOAD,
    and BS_PAYLOAD_BOOT as those are the states where coreboot is
    about to exit. As such, provide an architecture specific hook
    at these key places so that one is guaranteed any work done
    in arch_bootstate_coreboot_exit() is after all callbacks in
    the state machine.

BUG=chrome-os-partner:60657
    BRANCH=reef

Change-Id: Icb4afb341ab15af0670501b9d21799e564fb32c6
    Signed-off-by: Aaron Durbin 
    Reviewed-on: https://review.coreboot.org/17767
    Tested-by: build bot (Jenkins)
    Reviewed-by: Duncan Laurie 
    Reviewed-by: Andrey Petrov 
    Reviewed-by: Furquan Shaikh 
    Reviewed-by: Paul Menzel

See https://review.coreboot.org/17767 for details.

-gerrit