dt-bindings: display: msm: dp-controller: document SM8650 compatible

dt-bindings: display: msm: dp-controller: document SM8650 compatible

Document the DisplayPort controller found in the Qualcomm SM8650 SoC,
the Controller base addresses and layout differ and thus cannot use
the SM8350 compatible as fallback.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/571131/
Link: https://lore.kernel.org/r/20231207-topic-sm8650-upstream-dp-v1-1-b762c06965bb@linaro.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>