msm: camera_v2: handle subdev releases when qcamera daemon crashes.

When the daemon crashes, all the subdevs need to be released in a
specific order to ensure proper clean-up. This change creates
an ordered list of the subdevs during individual registrations,
based on their close sequences, and uses this list to make the release
subdev calls.

Change-Id: Ic95e53d88ba84f13b9db26f820822ed68dca48dc
Signed-off-by: Ankit Premrajka <ankitp@codeaurora.org>