dt-bindings: clk: qcom,dispcc-sm8x50: describe additional DP clocks

On the affected Qualcomm platforms the display clock controller has
additional DP input clocks, describe them in DT schema.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20240512-typec-fix-sm8250-v4-1-ad153c747a97@linaro.org


Signed-off-by: Bjorn Andersson <andersson@kernel.org>