[coreboot] Patch merged into coreboot/master: b7b57d9 libpayload: If there's no IO address space, don't try to use it for serial

the following patch was just integrated into master:
commit b7b57d97512f1a5fc9a102ae0374ff08242b6e0c
Author: Gabe Black 
Date:   Fri Jan 18 18:37:29 2013 -0800

libpayload: If there's no IO address space, don't try to use it for serial

Change-Id: I01b1fa42139af925716cd5d57f96dc24da6df5a7
    Signed-off-by: Gabe Black 
    Reviewed-on: http://review.coreboot.org/2660
    Tested-by: build bot (Jenkins)
    Reviewed-by: Ronald G. Minnich

Build-Tested: build bot (Jenkins) at Tue Mar 12 05:29:49 2013, giving +1
Reviewed-By: Ronald G. Minnich  at Wed Mar 13 23:03:21 2013, giving +2
See http://review.coreboot.org/2660 for details.

-gerrit