[coreboot] Patch merged into coreboot/master: 82eb56b libpayload: minor cleanups

the following patch was just integrated into master:
commit 82eb56b102aa2294961bb65a244b537d521b9d12
Author: Mathias Krause 
Date:   Tue Apr 3 20:42:01 2012 +0200

libpayload: minor cleanups

Apply some const correctness to const/non-const strings in libc and
    libpci (what an ugly cast that was).

Remove duplicated NULL test in printf_putstr(), already done in
    print_string() - reduces size of libpayload by a few bytes.

Change-Id: I13f479df13e39d79cab291e9d99d153e1ef43eae
    Signed-off-by: Mathias Krause

Build-Tested: build bot (Jenkins) at Tue Apr  3 21:36:56 2012, giving +1
See http://review.coreboot.org/849 for details.

-gerrit