media: ov2680: Add a bunch of register tweaks

Usually when developing a sensor driver with help from the vendor
the vendor will provide a bunch of register tweaks for optimal
performance of the sensor.

The atomisp-ov2680.c driver was (presumably) developed by Intel with
help from OmniVision and indeed contains a bunch of register tweaks.

Add these register tweaks to the "main" ov2680.c driver.

Acked-by: Rui Miguel Silva <rmfrfs@gmail.com>
Reviewed-by: Daniel Scally <dan.scally@ideasonboard.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>