change ro.sf.lcd_density from 540 to 560

Having it set at 540 causes bootloops occasionally, and 560 is the official nexus 6 DPI.
wcnss: move firmware and configs here

* variants can opt in

Change-Id: I6243c2abee6cb632bc0c8d6d0f889fb7de84cfea
wcnss: update firmware from D855 L release

* rom version: LGD855AT-00-V20a-GLOBAL-COM-NOV-11-2014+0

Change-Id: I24836b70d1f93515dc9282efddb5a78d862763e1
g3: remove old charger stuff

Change-Id: I470450efacf10b908c2723b1ac6858bb3e85f985