dts: nordic: Add channels property for local DPPI

Add number of channels implemented by the local DPPIC instances.

Signed-off-by: Adam Kondraciuk <adam.kondraciuk@nordicsemi.no>

dts/bindings/misc/nordic,nrf-dppic-local.yaml

@@ -11,3 +11,9 @@ description: |
 compatible: "nordic,nrf-dppic-local"
 
 include: ["nordic,nrf-dppic.yaml", "nordic,nrf-dppic-links.yaml"]
+
+properties:
+  channels:
+    type: int
+    required: true
+    description: Number of channels implemented by the DPPIC instance.

dts/vendor/nordic/nrf54h20.dtsi

@@ -369,6 +369,7 @@
 			dppic020: dppic@22000 {
 				compatible = "nordic,nrf-dppic-local";
 				reg = <0x22000 0x1000>;
+				channels = <32>;
 				status = "disabled";
 			};
 

dts/vendor/nordic/nrf9280.dtsi

@@ -250,6 +250,7 @@
 			dppic020: dppic@22000 {
 				compatible = "nordic,nrf-dppic-local";
 				reg = <0x22000 0x1000>;
+				channels = <32>;
 				status = "disabled";
 			};