ARM: dts: aspeed-g6: Add UDMA node

Add the device tree node for the UART DMA (UDMA) controller.

Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
Link: https://lore.kernel.org/r/20230320081133.23655-6-chiawei_wang@aspeedtech.com
Signed-off-by: Joel Stanley <joel@jms.id.au>

Author: ChiaweiW

arch/arm/boot/dts/aspeed-g6.dtsi

@@ -863,6 +863,15 @@
 				clocks = <&syscon ASPEED_CLK_GATE_FSICLK>;
 				status = "disabled";
 			};
+
+			udma: dma-controller@1e79e000 {
+				compatible = "aspeed,ast2600-udma";
+				reg = <0x1e79e000 0x1000>;
+				interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>;
+				dma-channels = <28>;
+				#dma-cells = <1>;
+				status = "disabled";
+			};
 		};
 	};
 };