arm64: dts: renesas: r8a77990: Enable USB3.0 host for Ebisu board

This patch adds and USB3.0 host device node and enable it for
R-Car E3 Ebisu board.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>