Patch merged into coreboot/master: 5d5f4b3 coreboot: add region infrastructure

the following patch was just integrated into master:
commit 5d5f4b3c84677213d669d2218bc9a21e4177dcf7
Author: Aaron Durbin 
Date:   Thu Mar 26 14:39:07 2015 -0500

coreboot: add region infrastructure

The region infrastructure provides a means of abstracting
    access to different types of storage such as SPI flash, MMC,
    or just plain memory. The regions are represented by
    region devices which can be chained together forming subregions
    of the larger region. This allows the call sites to be agnostic
    about the implementations behind the regions. Additionally, this
    prepares for a cleaner API for CBFS accesses.

Change-Id: I803f97567ef0505691a69975c282fde1215ea6da
    Signed-off-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/9128
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

See http://review.coreboot.org/9128 for details.

-gerrit