otter: Enable KSM by default

Change-Id: I9e9b0c1c94a07536ca459e2ea616b53210a3491a
Revert "otter: Switch to backports wl12xx driver (2/2)"

This reverts commit f7f0f66992ca0d74a2fbdeecc4445e7ba1b3d86a.
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0