Patch merged into coreboot/master: google/gru: update the pwm regulator

the following patch was just integrated into master:
commit 8c454aaafaf5bc13a50c4f4b3631e6be32fa0bca
Author: Caesar Wang 
Date:   Wed Jan 4 18:26:04 2017 +0800

google/gru: update the pwm regulator

As David commented the "Bob and other follow-ons match Gru, Kevin should
    be the special case here", and update the calculations value for gru/bob
    board.

From the actual tests, some regulator voltage than the actual set of less
    than 20mv on bob board. (e.g: little-cpus and Center-logic) Update the
    {min, max} regulator voltage for Bob board. Make sure we get the accurate
    voltage.

BUG=chrome-os-partner:61497
    BRANCH=none
    TEST=boot up Bob, measure the voltage for little cpu and C-logic.

Change-Id: Iad881b41d67708776bfb681487cf8cec8518064e
    Signed-off-by: Patrick Georgi 
    Original-Commit-Id: 25e133815f49018e7496c75077b8559c207350a4
    Original-Change-Id: I3098c742c7ec355c88f45bd1d93f878a7976a6b4
    Original-Signed-off-by: Caesar Wang 
    Original-Signed-off-by: Shasha Zhao 
    Original-Reviewed-on: https://chromium-review.googlesource.com/424523
    Original-Reviewed-by: David Schneider 
    Original-Reviewed-by: Brian Norris 
    Original-Signed-off-by: Shasha Zhao 
    Original-Reviewed-on: https://chromium-review.googlesource.com/430403
    Original-Reviewed-by: Julius Werner 
    Reviewed-on: https://review.coreboot.org/18460
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth

See https://review.coreboot.org/18460 for details.

-gerrit