When adapting the original doc conversion to support 2 lanes, minItems
should've been added as well since the sensor supports either 1 or 2
lanes. Add minItems to make the validation happy again.

Fixes: 8d561d78 ("media: dt-bindings: ov2685: convert to dtschema")
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230419-ov2685-dtschema-fixup-v1-1-c850a34b3a26@z3ntu.xyzSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>