media: atomisp: Pass MEDIA_BUS_FMT_* code when calling enum_frame_size pad-op

A sensor driver's enum_frame_size pad-op may return -EINVAL when
v4l2_subdev_frame_size_enum.code is not set to a supported
MEDIA_BUS_FMT_* code.

Make atomisp_init_sensor() get the sensor's MEDIA_BUS_FMT_* code and
pass this when calling the enum_frame_size pad-op.

Link: https://lore.kernel.org/r/20230529103741.11904-17-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>