media: atomisp: ov2680: Add missing ov2680_calc_mode() call to probe()

Call ov2680_calc_mode() from probe() instead of relying on userspace
to make at least one s_fmt call to fill the mode parameters.

Link: https://lore.kernel.org/r/20230529103741.11904-5-hdegoede@redhat.com



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