hwc: Add option to ignore fb1.

With Lollipop, HWC 1.0 and secondary displays don't play well together.
So we might as well just disable it and save 16MB of RAM.

Conflicts:
	BoardConfig.mk
tuna: add support for battery LED charging

Device has multi-color RGB LED, enable charging function
using existing custom lights library.
tuna: enable led customizations