media: dt-bindings: renesas,rzg2l-csi2: Document Renesas RZ/V2H(P) SoC

The MIPI CSI-2 block on the Renesas RZ/V2H(P) SoC is similar to the one
found on the Renesas RZ/G2L SoC, with the following differences:
- A different D-PHY
- Additional registers for the MIPI CSI-2 link
- Only two clocks

Add a new compatible string, `renesas,r9a09g057-csi2`, for the RZ/V2H(P)
SoC.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://lore.kernel.org/r/20250411170624.472257-2-tommaso.merciai.xr@bp.renesas.com


Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>