Patch merged into coreboot/master: b419c1a8 regions: add memory region device support

the following patch was just integrated into master:
commit b419c1a87ccb2037a88ffb533b5b4a11cfa387c0
Author: Aaron Durbin 
Date:   Fri Mar 27 01:03:45 2015 -0500

regions: add memory region device support

Provide common code for using memory-backed region devices.
    This allows in-memory buffers to act as a region device.

Change-Id: I266cd07bbfa16a427c2b31c512e7c87b77f47718
    Signed-off-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/9131
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/9131 for details.

-gerrit