Patch merged into coreboot/master: bootmode: add display_init_required()

the following patch was just integrated into master:
commit bc98cc66b2fe787173ec04b84ea11bc3e57fe373
Author: Aaron Durbin 
Date:   Wed Sep 2 09:21:36 2015 -0500

bootmode: add display_init_required()

Some of the Chrome OS boards were directly calling vboot
    called in some form after contorting around #ifdef preprocessor
    macros. The reasoning is that Chrome OS doesn't always do display
    initialization during startup. It's runtime dependent. While
    this is a requirement that doesn't mean vboot functions should be
    sprinkled around in the mainboard and chipset code. Instead provide
    one function, display_init_required(), that provides the policy
    for determining display initialization action. For Chrome OS
    devices this function honors vboot_skip_display_init() and all
    other configurations default to initializing display.

Change-Id: I403213e22c0e621e148773597a550addfbaf3f7e
    Signed-off-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/11490
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See http://review.coreboot.org/11490 for details.

-gerrit