Revert "[nrf fromlist] dts: arm: nordic: Add power states for nRF54H20"

This reverts commit 13aa404.

Signed-off-by: Grzegorz Swiderski <[email protected]>

Author: 57300

dts/common/nordic/nrf54h20.dtsi

@@ -30,7 +30,7 @@
 			device_type = "cpu";
 			clocks = <&cpuapp_hsfll>;
 			clock-frequency = <DT_FREQ_M(320)>;
-			cpu-power-states = <&idle_cache_disabled &s2ram>;
+			cpu-power-states = <&idle &s2ram>;
 		};
 
 		cpurad: cpu@3 {
@@ -39,7 +39,6 @@
 			device_type = "cpu";
 			clocks = <&cpurad_hsfll>;
 			clock-frequency = <DT_FREQ_M(256)>;
-			cpu-power-states = <&idle_cache_disabled>;
 		};
 
 		cpuppr: cpu@d {
@@ -128,14 +127,12 @@
 		};
 
 		power-states {
-			// substate-id = <0>; is reserved for "idle", cache powered on
-			// substate-id = <1>; is reserved for "idle-cache-retained"
-			idle_cache_disabled: idle_cache_disabled {
+			idle: idle {
 				compatible = "zephyr,power-state";
 				power-state-name = "suspend-to-idle";
-				substate-id = <2>;
 				min-residency-us = <100000>;
 			};
+
 			s2ram: s2ram {
 				compatible = "zephyr,power-state";
 				power-state-name = "suspend-to-ram";