fastcharge: initial Nexus 5 adaptation

added custom charge levels for better control over fastcharge

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

Conflicts:
	arch/arm/mach-msm/Makefile

Change-Id: I27b1809f59bd9bb219894f0e0e8748495d3025e6
fastcharge: increase battery charging current to use higher input current

Signed-off-by: Paul Reioux <reioux@gmail.com>
Defconfig: add Faux Fast Charge Driver

Change-Id: Idf607b76f4856703e8f25ea597aabb6b3d84e5a9