Patch merged into coreboot/master: fd57066 include/stdlib.h: Extend common macro collection

the following patch was just integrated into master:
commit fd570665ce9eb76e02d1fe5fb958e87ea017fd73
Author: Edward O'Callaghan 
Date:   Mon Jul 7 20:33:09 2014 +1000

include/stdlib.h: Extend common macro collection

Add the following useful macros:

* Absolute Value Macro
     * Taking ceiling of (a / b)
     * Check if value x is a power of 2 or not

Change-Id: I4e9a326aea3cdd963f13548d1fb63331a57d84b1
    Signed-off-by: Edward O'Callaghan 
    Reviewed-on: http://review.coreboot.org/6198
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi

See http://review.coreboot.org/6198 for details.

-gerrit