dt-bindings: phy: renesas,usb2-phy: Document RZ/V2H(P) SoC

Document USB2.0 phy bindings for RZ/V2H(P) ("R9A09gG57") SoC.

RZ/V2H(P) USB2.0 phy is similar to one found on the RZ/G2L SoC, but it
needs additional configuration to be done as compared RZ/G2L USB2.0 phy.
To handle this difference a SoC specific compat string is added for
RZ/V2H(P) SoC.

Like the RZ/G2L SoC, the RZ/V2H(P) USB2.0 PHY requires the `resets`
property and has two clocks.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250414145729.343133-3-prabhakar.mahadev-lad.rj@bp.renesas.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>