blx: Battery Life eXtender (BLX)

This is a simple port of Ezekeel's BLX mod to the Nexus 4.
See this thread for more information: http://forum.xda-developers.com/showthread.php?t=1257497
Let's keep the same sysfs implementation so that apps, such as Trickster MOD, can support this.
blx: Change the max charge to 100
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

Signed-off-by: Paul Reioux <reioux@gmail.com>

Conflicts:
	arch/arm/mach-msm/Kconfig
Enable BLX and FAST CHARGE

Signed-off-by: CallMeAldy <aldrin.holmes20@gmail.com>