USB force fast charging

-Use base from Chad Froebel <chadfroebel@gmail.com> so we continue to
use the same generic sysfs mechanism
-Referenced franco's git for drivers/usb/otg/msm_otg.c changes
https://github.com/franciscofranco/mako/commit/5a8a4c8e23c7e1df39c740b9ce1d5dda20b0ede3
Off by default
Turn on:
echo 1 > /sys/kernel/fast_charge/force_fast_charge
Turn off:
echo 0 > /sys/kernel/fast_charge/force_fast_charge

simple port to the htc 0ne

Change-Id: I6edf1a03c1b5622766521a7e386107d397094337