ARM: dts: msm: Add cpu idle-states for sun

Update enable-method to PSCI. Add idle-states node and
update cpu node to include appropriate idle state.

Disabled all idle-states for rumi.

Change-Id: I313d52c60081ef1d568781e33d0f2fed1a1f2de4
Signed-off-by: Rashid Zafar <quic_rzafar@quicinc.com>

qcom/sun-rumi.dtsi

@@ -14,6 +14,34 @@
 	};
 };
 
+&MEDIUM_OFF_C4 {
+	status = "nok";
+};
+
+&LARGE_OFF_C4 {
+	status = "nok";
+};
+
+&MEDIUM_CLUSTER_CL4 {
+	status = "nok";
+};
+
+&LARGE_CLUSTER_CL4 {
+	status = "nok";
+};
+
+&MEDIUM_CLUSTER_PWR_DN {
+	status = "nok";
+};
+
+&LARGE_CLUSTER_PWR_DN {
+	status = "nok";
+};
+
+&APSS_OFF {
+	status = "nok";
+};
+
 &arch_timer {
 	clock-frequency = <500000>;
 };