arm64: dts: ls1028a: Update edma compatible to fit eDMA driver

The eDMA of LS1028A soc has a little bit different from others, So we
should distinguish them in driver by compatible.
Signed-off-by: Peng Ma <peng.ma@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi

@@ -329,7 +329,7 @@ duart1: serial@21c0600 {
 
 		edma0: dma-controller@22c0000 {
 			#dma-cells = <2>;
-			compatible = "fsl,vf610-edma";
+			compatible = "fsl,ls1028a-edma";
 			reg = <0x0 0x22c0000 0x0 0x10000>,
 			      <0x0 0x22d0000 0x0 0x10000>,
 			      <0x0 0x22e0000 0x0 0x10000>;