Patch merged into coreboot/master: soc/intel/skylake: add option to statically clock gate 8254 timer

the following patch was just integrated into master:
commit fe4d62708af53afd3e2df2074545f26f5e01c671
Author: Aaron Durbin 
Date:   Thu Feb 25 17:17:35 2016 -0600

soc/intel/skylake: add option to statically clock gate 8254 timer

In order to save more power by shutting down clocks add the
    ability to optionally clock gate the 8254 programmable interrupt
    timer.  When doing this the platforms lose their "PC"-ness which
    certain payloads and OSes rely on such as SeaBIOS.

BUG=chrome-os-partner:50214
    BRANCH=glados
    TEST=Enabled option on chell. Noted the bit is set upon booting.

Change-Id: I01f9d177bbde417d1efec2e16656a07dcebccbde
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: 662575aa6a63656dedfa0ce1f202f5fac0205477
    Original-Change-Id: Ib4a613cf1c28fc96c36fa2987c4b58a05beab178
    Original-Signed-off-by: Aaron Durbin 
    Original-Reviewed-on: https://chromium-review.googlesource.com/329411
    Original-Reviewed-by: Duncan Laurie 
    Original-Reviewed-on: https://chromium-review.googlesource.com/331171
    Original-Commit-Ready: Patrick Georgi 
    Original-Tested-by: Patrick Georgi 
    Reviewed-on: https://review.coreboot.org/13985
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/13985 for details.

-gerrit