dts: arm: ti: cc23x0: Add DMA mode support to UART module

Add support to use DMA mode with cc23x0 UART module. This consists in
specifying the DMA channels and peripherals.

Signed-off-by: Julien Panis <jpanis@baylibre.com>

dts/arm/ti/cc23x0.dtsi

@@ -77,6 +77,8 @@
 			reg = <0x40034000 0x52>;
 			interrupts = <11 0>;
 			clocks = <&sysclk>;
+			dmas = <&dma 2 6>, <&dma 3 7>;
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};