The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform/ec/+/95139fa58280335f302827d96154038a7c23e0c0

commit 95139fa58280335f302827d96154038a7c23e0c0
Author: Daisuke Nojiri <dnojiri@chromium.org>
Date: Tue May 02 04:54:10 2017

usb_port_power: Allow variable number of ports

Currently, usb_port_power_dumb allows fixed number of ports (2)
and usb_port_power_smart allows less than 4 ports. This change
removes the limitation and makes them accept variable number of
ports.

BUG=chromium:715178
BRANCH=none
TEST=Verified usbchargemode returns consistent charge_mode across
sysjumps on Electro.

Change-Id: I7675c65ba03d3e6f7f53b2fe48cbe510231d945a
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/481077
Reviewed-by: Randall Spangler <rspangler@chromium.org>

[modify] https://crrev.com/95139fa58280335f302827d96154038a7c23e0c0/board/samus/board.c
[modify] https://crrev.com/95139fa58280335f302827d96154038a7c23e0c0/board/strago/board.c
[modify] https://crrev.com/95139fa58280335f302827d96154038a7c23e0c0/common/usb_port_power_dumb.c
[modify] https://crrev.com/95139fa58280335f302827d96154038a7c23e0c0/board/kahlee/board.c
[modify] https://crrev.com/95139fa58280335f302827d96154038a7c23e0c0/common/usb_port_power_smart.c
[modify] https://crrev.com/95139fa58280335f302827d96154038a7c23e0c0/board/reef/board.c