fastcharge: initial adaptation for Nexus 4

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

Conflicts:
	arch/arm/mach-msm/Kconfig

Change-Id: Ie42813b0d963345ab00d5c9ea8b9276ea20b26de
Enable Fast Charge in cyanogen_mako_defconfig

Change-Id: Ib93580a4b26ba5bff73b16bcd2c9728d5886aba1