Patch merged into coreboot/master: chromeos: push vbnv_* accessors from verstage to libverstage

the following patch was just integrated into master:
commit 5f2055d0d9e7f39e0d87e13e186716c6eda6e7a6
Author: Patrick Georgi 
Date:   Mon Jun 29 23:08:44 2015 +0200

chromeos: push vbnv_* accessors from verstage to libverstage

That way they're available wherever the verstage code ends up, bootblock,
    verstage or romstage.

Change-Id: I6e59a40761f95a98d96a9b72e3bbcc59caae9b1a
    Signed-off-by: Patrick Georgi 
    Reviewed-on: http://review.coreboot.org/10706
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/10706 for details.

-gerrit