msm: camera: Block release if device is active on link

In case a device is still active on a link i.e. unlink
procedure has not been invoked in the CRM we should not
allow release of such devices.

Change-Id: I02a9705156b9fb0eb6eabc6f764c54e0db0efa24
Signed-off-by: Karthik Anantha Ram <kartanan@codeaurora.org>