arm64: dts: qcom: sm8550-mtp: enable display hardware

Enable MDSS/DPU/DSI0 on SM8550-MTP device.

Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230104-topic-sm8550-upstream-dts-display-v4-2-1729cfc0e5db@linaro.org