Patch merged into coreboot/master: arch/x86/acpigen: Clean up acpigen library

the following patch was just integrated into master:
commit e4e9b94db18c1b9e646a0b4d6a0bef24dc02b335
Author: Furquan Shaikh 
Date:   Thu Oct 20 23:09:05 2016 -0700

arch/x86/acpigen: Clean up acpigen library

Instead of using hard-coded values for emitting op codes and prefix
    codes, define and use enum constants. With this change, it becomes
    easier to read the code as well.

BUG=chrome-os-partner:55988

Change-Id: I6671b84c2769a8d9b1f210642f3f8fd3d902cca2
    Signed-off-by: Furquan Shaikh 
    Reviewed-on: https://review.coreboot.org/17078
    Tested-by: build bot (Jenkins)
    Reviewed-by: Duncan Laurie

See https://review.coreboot.org/17078 for details.

-gerrit