arm64: dts: renesas: r9a09g056n48-rzv2n-evk: Enable USB3.0 PHY and xHCI controller

arm64: dts: renesas: r9a09g056n48-rzv2n-evk: Enable USB3.0 PHY and xHCI controller

Enable the USB3.0 (CH0) host controllers on the RZ/V2N Evaluation Kit.
The CN4 connector on the EVK provides access to the USB3.0 channel.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://patch.msgid.link/20251119110505.100253-5-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>