dts: arm: ti: cc23x0: Add power management support

Add support for PM to cc23x0 SoC.

Signed-off-by: Stoyan Bogdanov <sbogdanov@baylibre.com>
Signed-off-by: Julien Panis <jpanis@baylibre.com>

Author: bogdanovs

dts/arm/ti/cc23x0.dtsi

@@ -22,6 +22,31 @@
 			compatible = "arm,cortex-m0+";
 			clock-frequency = <DT_FREQ_M(48)>;
 			reg = <0>;
+			cpu-power-states = <&state0 &state1 &state2>;
+		};
+
+		power-states {
+			state0: state0 {
+				compatible = "zephyr,power-state";
+				power-state-name = "runtime-idle";
+				min-residency-us = <315>;
+			};
+
+			state1: state1 {
+				compatible = "zephyr,power-state";
+				power-state-name = "standby";
+				min-residency-us = <315>;
+				exit-latency-us = <185>;
+			};
+
+			/* PM_STATE_SOFT_OFF can be entered only by calling pm_state_force */
+			state2: state2 {
+				compatible = "zephyr,power-state";
+				power-state-name = "soft-off";
+				min-residency-us = <0>;
+				exit-latency-us = <0>;
+				status = "disabled";
+			};
 		};
 	};