dm: ls1021a: dts: Update USB 3.0 node to support DM USB

Update USB 3.0 controller dts node in ls1021a.dtsi.

Signed-off-by: Rajesh Bhagat <rajesh.bhagat@nxp.com>
diff --git a/arch/arm/dts/ls1021a.dtsi b/arch/arm/dts/ls1021a.dtsi
index ee0e554..119b1af 100644
--- a/arch/arm/dts/ls1021a.dtsi
+++ b/arch/arm/dts/ls1021a.dtsi
@@ -368,7 +368,7 @@
 		};
 
 		usb3@3100000 {
-			compatible = "snps,dwc3";
+			compatible = "fsl,layerscape-dwc3";
 			reg = <0x3100000 0x10000>;
 			interrupts = <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>;
 			dr_mode = "host";