Patch merged into coreboot/master: be25129 ramstage_cache: allow ramstage usage add valid helper

the following patch was just integrated into master:
commit be2512973d04f3da3cebfd3e7ee10809fbe4ae4a
Author: Aaron Durbin 
Date:   Thu Dec 12 10:10:52 2013 -0800

ramstage_cache: allow ramstage usage add valid helper

Allow ramstage cache to be used from ramstage proper. Also
    add a helper function for checking validity of ramstage
    cache structure.

BUG=chrome-os-partner:22867
    BRANCH=None
    TEST=Built and booted. S3 resumed.

Change-Id: If1f2ad1bcf64504b42e315be243a12432b50e3d5
    Signed-off-by: Aaron Durbin 
    Reviewed-on: https://chromium-review.googlesource.com/179775
    Reviewed-by: Duncan Laurie 
    Reviewed-on: http://review.coreboot.org/5011
    Tested-by: build bot (Jenkins)
    Reviewed-by: Kyösti Mälkki

See http://review.coreboot.org/5011 for details.

-gerrit