msm: camera: Fix camif raw stop failure

Register update irqs are not fired when only camif raw is enabled.
This change fix the failure by adding support to handle stream
updates in camif irqs instead of register update irqs.

Change-Id: I017eb4076eb5240b2e5da2b6e984ce05a7a2a008
Signed-off-by: Kevin Chan <ktchan@codeaurora.org>