Patch merged into coreboot/master: arch/x86/acpigen: Add support for interacting with GPIOs

the following patch was just integrated into master:
commit 0a48aee795942538e006bba42c188ee95afb49bb
Author: Furquan Shaikh 
Date:   Thu Oct 20 07:12:49 2016 -0700

arch/x86/acpigen: Add support for interacting with GPIOs

Since reading/toggling of GPIOs is platform-dependent task, provide an
    interface with common functions to generate ACPI AML code for
    manipulating GPIOs:
    1. acpigen_soc_read_rx_gpio
    2. acpigen_soc_get_tx_gpio
    3. acpigen_soc_set_tx_gpio
    4. acpigen_soc_clear_tx_gpio

Provide weak implementations of above functions. These functions are
    expected to be implemented by every SoC that uses ACPI. This allows
    drivers to easily generate ACPI AML code to interact GPIOs.

BUG=chrome-os-partner:55988

Change-Id: I3564f15a1cb50e6ca6132638447529648589aa0e
    Signed-off-by: Furquan Shaikh 
    Reviewed-on: https://review.coreboot.org/17080
    Tested-by: build bot (Jenkins)
    Reviewed-by: Duncan Laurie 
    Reviewed-by: Aaron Durbin

See https://review.coreboot.org/17080 for details.

-gerrit