arm64: dts: qcom: sc7180: rename DPU device node

Rename DPU device node to display-controller@ae01000 to follow the
DPU schema.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220708091656.2769390-2-dmitry.baryshkov@linaro.org

arch/arm64/boot/dts/qcom/sc7180.dtsi

@@ -2911,7 +2911,7 @@ mdss: mdss@ae00000 {
 
 			status = "disabled";
 
-			mdp: mdp@ae01000 {
+			mdp: display-controller@ae01000 {
 				compatible = "qcom,sc7180-dpu";
 				reg = <0 0x0ae01000 0 0x8f000>,
 				      <0 0x0aeb0000 0 0x2008>;