armv8: ls1046a: added usb nodes in dts

The LS1046A processor has three integrated USB 3.0 controllers
(USB1, USB2, and USB3) that allow direct connection to the USB
ports with appropriate protection circuitry and power supplies.
USB1 and USB2 ports are powered by a NX5P2190UK device, which
supplies 5v power at up to 1.2 A. The power enable and
power-fault-detect pins are connected to the LS1046A processor
via CPLD for individual port management.

Signed-off-by: Tang Yuantian <yuantian.tang@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>