arm64: dts: renesas: r8a774c0: Add USB3.0 device nodes

Add usb3.0 host and function device nodes to the RZ/G2E SoC dtsi.

Signed-off-by: Fabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>