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 <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/6198
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

0 files changed, 0 insertions, 0 deletions