msm: camera: Add CSIPHY core select in camera info for 8974

Until 8960, CSID cores are physically connected to its corresponding
CSIPHY cores. Hence CSID core can receive data only from its CSIPHY
core. On 8974, CSID core can receive data from any CSIPHY core. Add
support for CSIPHY core select in camera sensor platform data and use
the CSIPHY core value to select the subdev during msm open. For 8974,
initialize wait_num_frames during sensor probe if its not initialized
in sensor driver.

Change-Id: I46e4be6425c631f0675a547faf46efd746401fe6
Signed-off-by: Sreesudhan Ramakrish Ramkumar <srramku@codeaurora.org>