Revert "[nrf fromlist] boards: Define pm_s2ram_stack for nRF54H20"

This reverts commit cdc11bd.

Signed-off-by: Adam Kondraciuk <[email protected]>

Author: adamkondraciuk

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts

@@ -343,19 +343,12 @@ zephyr_udc0: &usbhs {
 
 /* Trim this RAM block for making room on all run-time common S2RAM cpu context. */
 &cpuapp_ram0 {
-	reg = <0x22000000 (DT_SIZE_K(32) - 48)>;
-	ranges = <0x0 0x22000000 (0x8000 - 0x30)>;
+	reg = <0x22000000 (DT_SIZE_K(32) - 32)>;
+	ranges = <0x0 0x22000000 (0x8000 - 0x20)>;
 };
 
 / {
 	soc {
-		/* temporary stack for S2RAM resume logic */
-		pm_s2ram_stack: cpuapp_s2ram_stack@22007fd0  {
-			compatible = "zephyr,memory-region", "mmio-sram";
-			reg = <0x22007fd0 16>;
-			zephyr,memory-region = "pm_s2ram_stack";
-		};
-
 		/* run-time common S2RAM cpu context RAM */
 		pm_s2ram: cpuapp_s2ram@22007fe0  {
 			compatible = "zephyr,memory-region", "mmio-sram";