media: ipu-bridge: Add link-frequency to OV2680 ipu_supported_sensors[] entry

Now that the ov2680 driver verifies the bus-cfg from the endpoint
fwnode the link-frequency must be set for things to work.

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>