dts: renesas: smartbond: Support the DMA engine.

Update DTS and board configurations to support the DMA accelerator.

Signed-off-by: Ioannis Karachalios <ioannis.karachalios.px@renesas.com>

boards/arm/da1469x_dk_pro/da1469x_dk_pro.yaml

@@ -17,4 +17,5 @@ supported:
   - usb_device
   - rtc
   - crypto
+  - dma
 vendor: renesas

dts/arm/renesas/smartbond/da1469x.dtsi

@@ -303,6 +303,16 @@
 			interrupts = <15 0>, <21 0>;
 			status = "disabled";
 		};
+
+		dma: dma@50040800 {
+			compatible = "renesas,smartbond-dma";
+			reg = <0x50040800 0x110>;
+			interrupts = <1 0>;
+			status = "disabled";
+			dma-channels = <8>;
+			block-count = <1>;
+			#dma-cells = <0>;
+		};
 	};
 };