dt-bindings: display/msm: add interconnects property to qcom, mdss-smd845

Add interconnects required for the SDM845 MDSS device tree node. This
change was made in the commit c8c61c09 ("arm64: dts: qcom: sdm845:
Add interconnects property for display"), but was not reflected in the
schema.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/508380/
Link: https://lore.kernel.org/r/20221024164225.3236654-4-dmitry.baryshkov@linaro.org


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>