[coreboot] Patch merged into coreboot/master: c52e106 AMD S3: Add missing erasing flash sector for saving MTRR register

the following patch was just integrated into master:
commit c52e1065df07c24606381efb7598b1d29dc625b1
Author: Zheng Bao 
Date:   Sun Feb 10 21:20:39 2013 +0800

AMD S3: Add missing erasing flash sector for saving MTRR register

It has worked up to now because the region is already erased
    the first time the board boots, and every additional boot the
    same data is being written over the old data.(by Dave Frodin)

Change-Id: Id334c60668e31d23c1d552d0ace8eb6ae5513e6b
    Signed-off-by: Zheng Bao 
    Signed-off-by: zbao 
    Reviewed-on: http://review.coreboot.org/2304
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

Reviewed-By: Patrick Georgi  at Mon Feb 11 08:24:01 2013, giving +2
See http://review.coreboot.org/2304 for details.

-gerrit