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 <zheng.bao@amd.com>
Signed-off-by: Zheng Bao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/1527
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>

0 files changed, 0 insertions, 0 deletions