[coreboot] Patch merged into coreboot/master: 7fa9070 AMD Hudson: use awk to calulate instead of expr

the following patch was just integrated into master:
commit 7fa90703dd54e85e0104a7e1112bbb9945c062ed
Author: Zheng Bao 
Date:   Mon Sep 17 15:39:44 2012 +0800

AMD Hudson: use awk to calulate instead of expr

Command expr in some systems only take 32bit as integer, which
    value is at 0x7FFFFFFF ~ -0x80000000. Use awk as alternate way to
    calculate.
    And some system doesnt take hex value in Makefile, even in awk instruction.

Change-Id: Ie35d6a5b96eea4192bd9cab857af4d4dcb37b9ed
    Signed-off-by: Zheng Bao 
    Signed-off-by: Zheng Bao

Reviewed-By: Patrick Georgi  at Mon Sep 17 07:59:47 2012, giving +2
See http://review.coreboot.org/1527 for details.

-gerrit