dts/boards: nordic: fix register properties

Add missing reg property to peripherals.

Signed-off-by: Giacomo Dematteis <giacomo.dematteis@nordicsemi.no>

Author: DematteisGiacomo

dts/arm/nordic/nrf91.dtsi

@@ -37,6 +37,7 @@
 		};
 
 		peripheral@50000000 {
+			reg = <0x50000000 0x10000000>;
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges = <0x0 0x50000000 0x10000000>;

dts/arm/nordic/nrf91ns.dtsi

@@ -38,6 +38,7 @@
 		};
 
 		peripheral@40000000 {
+			reg = <0x40000000 0x10000000>;
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges = <0x0 0x40000000 0x10000000>;

dts/vendor/nordic/nrf9280.dtsi

@@ -159,6 +159,7 @@
 		};
 
 		cpuapp_peripherals: peripheral@52000000 {
+			reg = <0x52000000 0x1000000>;
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges = <0x0 0x52000000 0x1000000>;
@@ -359,6 +360,7 @@
 		};
 
 		global_peripherals: peripheral@5f000000 {
+			reg = <0x5f000000 0x1000000>;
 			#address-cells = <1>;
 			#size-cells = <1>;
 			ranges = <0x0 0x5f000000 0x1000000>;