uboot-imx

MLK-22045-4 dts: Add a new usb3 host node on imx8qm/qxp

Since one node in dts only can bind with one driver in u-boot,
now both DM usb gadget and host drivers are enabled in imx8qm/qxp,
but there only one usb3 node in dts, so the DM usb gadget driver
and host driver can not both work.

So add a new usb3 host node on imx8qm/qxp to fix this issue, and add
a new alias for the usb3 host node which is used as seq number in DM
USB host driver.

Signed-off-by: Sherry Sun <sherry.sun@nxp.com>