ov5640: only setup ov5640 register when sensor is ov5640

Signed-off-by: Josh Wu <josh.wu@atmel.com>
ov5640: add AFC firmware in registers

Signed-off-by: Josh Wu <josh.wu@atmel.com>
ov5640: enable/disable continuely auto focus when start/stop the sensor

Signed-off-by: Josh Wu <josh.wu@atmel.com>
ov5640: check the afc firmware initialized result

add parameters for wait_status function, so it can be used to check AFC
firmware initialized result

Signed-off-by: Josh Wu <josh.wu@atmel.com>
ov5640: add error handling code

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Merge branch 'at91-3.10-trunk/v3.10_drivers_camera_sensor' into linux-3.10-at91