msm: camera: Check status of actuators

The actuator should be included in sensor subdev list
only if it is enabled/exist, otherwise during next expected
requests the CCI bus will produce error/timeout.

Info:
 qcom,actuator: probe of 1b0c000.qcom,cci:qcom,
  actuator@0failed with error -22

Change-Id: Id941d046134d4c8e63f376c635695a8296c73fea
Signed-off-by: Atanas Filipov <afilipov@codeaurora.org>