Patch merged into coreboot/master: Documentation: Add documentation for GPIO toggling in ACPI AML

the following patch was just integrated into master:
commit 4ef7491b2213555ad71920035b5d08e7798024fb
Author: Furquan Shaikh 
Date:   Tue Oct 25 12:36:17 2016 -0700

Documentation: Add documentation for GPIO toggling in ACPI AML

This document provides information about the different functions that a
    driver can use for generating ACPI code for toggling GPIO. These
    functions are expected to be implemented by the SoC. It also defines the
    different constraints on use of Local variables in ACPI code while
    implementing these functions.

BUG=chrome-os-partner:55988

Change-Id: Ibc03d766afb6d7b75bc0dc9f79920b561f1c4a78
    Signed-off-by: Furquan Shaikh 
    Reviewed-on: https://review.coreboot.org/17128
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin

See https://review.coreboot.org/17128 for details.

-gerrit