[coreboot-gerrit] Patch merged into coreboot/master: 899d13d cbfs: new API and better program loading

the following patch was just integrated into master:
commit 899d13d0dff9e7495eb17950f19431e9bd344b2f
Author: Aaron Durbin 
Date:   Fri May 15 23:39:23 2015 -0500

cbfs: new API and better program loading

A new CBFS API is introduced to allow making CBFS access
    easier for providing multiple CBFS sources. That is achieved
    by decoupling the cbfs source from a CBFS file. A CBFS
    source is described by a descriptor. It contains the necessary
    properties for walking a CBFS to locate a file. The CBFS
    file is then decoupled from the CBFS descriptor in that it's
    no longer needed to access the contents of the file.

All of this is accomplished using the regions infrastructure
    by repsenting CBFS sources and files as region_devices. Because
    region_devices can be chained together forming subregions this
    allows one to decouple a CBFS source from a file. This also allows
    one to provide CBFS files that came from other sources for
    payload and/or stage loading.

The program loading takes advantage of those very properties
    by allowing multiple sources for locating a program. Because of
    this we can reduce the overhead of loading programs because
    it's all done in the common code paths. Only locating the
    program is per source.

Change-Id: I339b84fce95f03d1dbb63a0f54a26be5eb07f7c8
    Signed-off-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/9134
    Tested-by: build bot (Jenkins)
    Tested-by: Raptor Engineering Automated Test Stand 
    Reviewed-by: Patrick Georgi

See http://review.coreboot.org/9134 for details.

-gerrit