ARM: dts: msm: Added CPUIdle and PSCI devices for kera

Added idle states for CPUs and CPU clusters, and PSCI device
to enable CPUs to enter deeper LPMs.
Disabled the idle states till Rumi validations are done.

Additionally. updated APPS RSC device to be in cluster power domain
to handle RSC activities when cluster is powering off.

Change-Id: Ic41e219c5c4dabe29f9ac787010ea09c5c123534
Signed-off-by: Sneh Mankad <quic_smankad@quicinc.com>

qcom/kera-rumi.dtsi

@@ -42,3 +42,39 @@
 		maximum-speed = "high-speed";
 	};
 };
+
+&SILVER_OFF {
+	status = "disabled";
+};
+
+&SILVER_RAIL_OFF {
+	status = "disabled";
+};
+
+&GOLD_OFF {
+	status = "disabled";
+};
+
+&GOLD_RAIL_OFF {
+	status = "disabled";
+};
+
+&GOLD_PLUS_OFF {
+	status = "disabled";
+};
+
+&GOLD_PLUS_RAIL_OFF {
+	status = "disabled";
+};
+
+&CLUSTER_PWR_DN {
+	status = "disabled";
+};
+
+&CX_RET {
+	status = "disabled";
+};
+
+&APSS_OFF {
+	status = "disabled";
+};