msm: camera: Free queue data during camera close

CPP hardware is singleton, only one hardware used for processing
frames of different camera if more than one camera is running at
the same time. When camera is closed ensure that processing frame
queue and event data queue is empty.

Change-Id: Ie8e41431dd9b7acd29bac0f59fe2d4afa243ec2c
Signed-off-by: Sreesudhan Ramakrish Ramkumar <srramku@codeaurora.org>