arm64: dts: qcom: x1e80100: Add remote endpoints between PHYs and DPs

Describe the port/endpoints graph between the USB/DP combo PHYs and their
corresponding DP controllers.
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20240606-x1e80100-dts-pmic-glink-v2-1-972c902e3e6b@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/x1e80100.dtsi

@@ -2567,6 +2567,7 @@ port@2 {
 					reg = <2>;
 
 					usb_1_ss0_qmpphy_dp_in: endpoint {
+						remote-endpoint = <&mdss_dp0_out>;
 					};
 				};
 			};
@@ -2634,6 +2635,7 @@ port@2 {
 					reg = <2>;
 
 					usb_1_ss1_qmpphy_dp_in: endpoint {
+						remote-endpoint = <&mdss_dp1_out>;
 					};
 				};
 			};
@@ -2701,6 +2703,7 @@ port@2 {
 					reg = <2>;
 
 					usb_1_ss2_qmpphy_dp_in: endpoint {
+						remote-endpoint = <&mdss_dp2_out>;
 					};
 				};
 			};
@@ -3995,6 +3998,7 @@ port@1 {
 						reg = <1>;
 
 						mdss_dp0_out: endpoint {
+							remote-endpoint = <&usb_1_ss0_qmpphy_dp_in>;
 						};
 					};
 				};
@@ -4077,6 +4081,7 @@ port@1 {
 						reg = <1>;
 
 						mdss_dp1_out: endpoint {
+							remote-endpoint = <&usb_1_ss1_qmpphy_dp_in>;
 						};
 					};
 				};
@@ -4156,6 +4161,10 @@ mdss_dp2_in: endpoint {
 
 					port@1 {
 						reg = <1>;
+
+						mdss_dp2_out: endpoint {
+							remote-endpoint = <&usb_1_ss2_qmpphy_dp_in>;
+						};
 					};
 				};