arm64: dts: qcom: sm8450-hdk: enable display hardware

Enable MDSS/DPU/DSI0 on SM8450-HDK device.

Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221207012803.114959-4-dmitry.baryshkov@linaro.org