The panel-common schema does not define what "ports" property is, so
bring the definition by referencing the panel-common-dual.yaml. Panels
can be single- or dual-link, depending on the compatible, thus add
if:then:else: block narrowing ports per variant.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20240325103611.28240-3-krzysztof.kozlowski@linaro.org


Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240325103611.28240-3-krzysztof.kozlowski@linaro.org