media: atomisp: ov2680: Make setting the modes algorithm based

Instead of using a long fixed register settings list for each resolution,
calculate the register settings based on the requested width + height.

This will allow future enhancements like adding hblank and vblank controls
and adding selection support.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>