arm64: dts: qcom: qrb5165-rb5: enable DP altmode

Add displayport altmode declaration to the Type-C controller node to
enable DP altmode negotiation.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20230817145940.9887-5-dmitry.baryshkov@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

arch/arm64/boot/dts/qcom/qrb5165-rb5.dts

@@ -1423,6 +1423,13 @@ PDO_FIXED_DUAL_ROLE |
 					 PDO_FIXED_USB_COMM |
 					 PDO_FIXED_DATA_SWAP)>;
 
+		altmodes {
+			displayport {
+				svid = <0xff01>;
+				vdo = <0x00001c46>;
+			};
+		};
+
 		ports {
 			#address-cells = <1>;
 			#size-cells = <0>;