[nrf fromtree] dts: nordic: Add NRF MPC node in dts

Add the Nordic Memory Privilege Controller (MPC)
in the dtsi of nrf54l15/10/05.

This sets the number of override regions and the
granularity of the regions.

Signed-off-by: Georgios Vasilakis <[email protected]>
(cherry picked from commit 320505e)

Author: Vge0rge

dts/common/nordic/nrf54l_05_10_15.dtsi

@@ -729,6 +729,15 @@
 			};
 		};
 
+		nrf_mpc: memory@50041000 {
+			compatible = "nordic,nrf-mpc";
+			reg = <0x50041000 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			override-num = <5>;
+			override-granularity = <4096>;
+		};
+
 		cpuapp_ppb: cpuapp-ppb-bus {
 			#address-cells = <1>;
 			#size-cells = <1>;