uboot-phytec

MLK-14497 mx6/mx7: DTS: Update dtsi file to add usb alias

After changed to USB DM driver, the framework uses the seq to find usb
device when registering a gadget driver. We have to add usb0 alias in
all i.MX6 and i.MX7 dtsi, otherwise the gadget driver register will fail.

Signed-off-by: Ye Li <ye.li@nxp.com>