ARM: dts: msm: add rt rotator support for SDM660

Add required changes to enable rt rotator support on SDM660.

Change-Id: I5fbb10797c4282ea9acc09a39a7ec31a68315edb

qcom/sdm660-mdss.dtsi

@@ -10,6 +10,9 @@
 		interrupts = <0 83 IRQ_TYPE_LEVEL_HIGH>;
 		interrupt-controller;
 		#interrupt-cells = <1>;
+
+		#list-cells = <1>;
+
 		vdd-supply = <&gdsc_mdss>;
 
 		/* Bus Scale Settings */
@@ -580,6 +583,8 @@
 		reg-names = "mdp_phys",
 			"rot_vbif_phys";
 
+		#list-cells = <1>;
+
 		qcom,mdss-rot-mode = <1>;
 		qcom,mdss-highest-bank-bit = <0x1>;
 
@@ -607,6 +612,7 @@
 		interrupt-parent = <&mdss_mdp>;
 		interrupts = <2 0>;
 
+		qcom,mdss-rot-parent = <&mdss_mdp 0>;
 		/* VBIF QoS remapper settings*/
 		qcom,mdss-rot-vbif-qos-setting = <1 1 1 1>;
 		qcom,mdss-rot-xin-id = <14 15>;