Patch merged into coreboot/master: e62cf52 regions: add mmap helper device

the following patch was just integrated into master:
commit e62cf5210c0c4b51bab803c7a3c8134da866da2b
Author: Aaron Durbin 
Date:   Fri Mar 27 01:58:06 2015 -0500

regions: add mmap helper device

In order to facilitate platforms which need a buffer cache
    for performing boot device operations provide infrastructure
    to share the logic in managing the buffer and operations.

Change-Id: I45dd9f213029706ff92a3e5a2c9edd5e8b541e27
    Signed-off-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/9132
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/9132 for details.

-gerrit