Patch merged into coreboot/master: bc07f5d x86: add rom cache variable MTRR index to tables

the following patch was just integrated into master:
commit bc07f5d93552640793254ce003937ec646120a21
Author: Aaron Durbin 
Date:   Tue Mar 26 13:09:39 2013 -0500

x86: add rom cache variable MTRR index to tables

Downstream payloads may need to take advantage of caching the
    ROM for performance reasons. Add the ability to communicate the
    variable range MTRR index to use to perform the caching enablement.

An example usage implementation would be to obtain the variable MTRR
    index that covers the ROM from the coreboot tables. Then one would
    disable caching and change the MTRR type from uncacheable to
    write-protect and enable caching. The opposite sequence is required
    to tearn down the caching.

Change-Id: I4d486cfb986629247ab2da7818486973c6720ef5
    Signed-off-by: Aaron Durbin 
    Reviewed-on: http://review.coreboot.org/2919
    Tested-by: build bot (Jenkins)
    Reviewed-by: Stefan Reinauer

Build-Tested: build bot (Jenkins) at Fri Mar 29 14:48:13 2013, giving +1
Reviewed-By: Stefan Reinauer  at Fri Mar 29 20:09:36 2013, giving +2
See http://review.coreboot.org/2919 for details.

-gerrit