arm: dts: imx8mq: Add alias for two usb controllers

Add alias for two DWC3 usb controllers to fix the seq index.

Signed-off-by: Ye Li <ye.li@nxp.com>
Tested-by: Patrick Wildt <patrick@blueri.se>
diff --git a/arch/arm/dts/imx8mq.dtsi b/arch/arm/dts/imx8mq.dtsi
index a841a02..a44f729 100644
--- a/arch/arm/dts/imx8mq.dtsi
+++ b/arch/arm/dts/imx8mq.dtsi
@@ -39,6 +39,8 @@
 		spi0 = &ecspi1;
 		spi1 = &ecspi2;
 		spi2 = &ecspi3;
+		usb0 = &usb_dwc3_0;
+		usb1 = &usb_dwc3_1;
 	};
 
 	ckil: clock-ckil {