msm: camera: common: add reference count for all video subdevs
Add reference count for all camera subdevs to avoid open/close
count mismatch.
CRs-Fixed: 2714527
Change-Id: I68c38106a071bb2e87c5e2695ebf60035f8e6a62
Signed-off-by:
taojiang <taojiang@codeaurora.org>
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