msm: camera: sensor: Add support to write sensor registers in probe

Few sensors needs to unlock register bank for reading
sensor ID from sensor register for probe. This change
adds support to write sensor registers in probe cmd
just after power on and before reading the sensor ID.

CRs-Fixed: 3034934
Change-Id: I42ad13921c8510fb5a6dde361d62b442688a99b4
Signed-off-by: Om Parkash <oparkash@codeaurora.org>