media: dt-bindings: media: renesas,vsp1: Document RZ/V2N SoC

media: dt-bindings: media: renesas,vsp1: Document RZ/V2N SoC

The VSPD block on the RZ/V2N SoC is identical to the one found on the
RZ/G2L SoC.

No driver changes are required, as `renesas,r9a07g044-vsp2` will be used
as a fallback compatible string on the RZ/V2N SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20250530154148.374663-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>