wl12xx: Move firmware location to system

Also fix minimum needed firmware

Change-Id: I851fe8acc046350367c4872dd75f485e8a1792c6
wl12xx: Don't build BlueDroid as a module

Signed-off-by: Michael Bestas <mikeioannina@gmail.com>

Change-Id: If3f17520e13fc631ead690fc6efe9208324bf639