media: atomisp: ov2680: Remove unused data-types and defines from ov2680.h

Remove a bunch of unused data-types and defines from ov2680.h.

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