arm64: dts: qcom: sm8350-hdk: remove useless enablement of mdss_mdp

The MDP/DPU device is not disabled by default, so there is not point in
enabling it in the board DTS file.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230531011623.3808538-3-dmitry.baryshkov@linaro.org

arch/arm64/boot/dts/qcom/sm8350-hdk.dts

@@ -424,10 +424,6 @@ mdss_dp0_out: endpoint {
 	};
 };
 
-&mdss_mdp {
-	status = "okay";
-};
-
 &mpss {
 	status = "okay";
 	firmware-name = "qcom/sm8350/modem.mbn";