ARM: dts: aspeed: g6: Drop unspecified aspeed,ast2600-udma node

There's neither a binding defined nor a driver that matches on the
compatible, so drop it from the devicetree until someone is motivated to
solve the problems.

Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>

arch/arm/boot/dts/aspeed/aspeed-bmc-facebook-clemente.dts

@@ -1293,10 +1293,6 @@ &mac3 {
 	use-ncsi;
 };
 
-&udma {
-	status = "okay";
-};
-
 &uart1 {
 	status = "okay";
 };

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

@@ -866,15 +866,6 @@ fsim1: fsi@1e79b100 {
 				interrupt-controller;
 				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";
-			};
 		};
 	};
 };