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
Merge remote-tracking branch 'cm/cm-12.0' into HEAD