[coreboot] Patch merged into coreboot/master: f2e1f6a Drop SRC_ROOT from mainboard Makefile.incs

the following patch was just integrated into master:
commit f2e1f6a8628d4c13640688790be9550aa9839b34
Author: Stefan Reinauer 
Date:   Thu Feb 28 00:12:18 2013 +0100

Drop SRC_ROOT from mainboard Makefile.incs

It's not used, and not needed.

Change-Id: Ifca92f3606ac58fc26e09676488c3add5d84ae79
    Signed-off-by: Stefan Reinauer 
    Reviewed-on: http://review.coreboot.org/2548
    Tested-by: build bot (Jenkins)
    Reviewed-by: Paul Menzel

Build-Tested: build bot (Jenkins) at Thu Feb 28 00:22:18 2013, giving +1
See http://review.coreboot.org/2548 for details.

-gerrit