[nrf fromlist] boards: nordic: nrf54h20dk: Add ETR buffer to memory map

Add 4k ETR buffer to the memory map.

Upstream PR: zephyrproject-rtos/zephyr#72476

Signed-off-by: Krzysztof Chruściński <[email protected]>

Author: nordic-krch

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20-memory_map.dtsi

@@ -51,6 +51,23 @@
 			};
 		};
 
+		etr_buf_ram0x_region: memory@2f0be000 {
+			/* TODO to be reworked when SDFW with STM support is released.*/
+			compatible = "nordic,owned-memory";
+			reg = <0x2f0be000 DT_SIZE_K(4)>;
+			status = "disabled";
+			perm-read;
+			perm-write;
+			perm-secure;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			ranges = <0x0 0x2f0be000 0x1000>;
+
+			etr_buffer: memory@0 {
+				reg = <0x0 DT_SIZE_K(4)>;
+			};
+		};
+
 		cpuapp_cpurad_ram0x_region: memory@2f0bf000 {
 			compatible = "nordic,owned-memory";
 			reg = <0x2f0bf000 DT_SIZE_K(4)>;

boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts

@@ -121,6 +121,10 @@
 	status = "okay";
 };
 
+&etr_buf_ram0x_region {
+	status = "okay";
+};
+
 &cpuapp_cpurad_ram0x_region {
 	status = "okay";
 };