media: dt-bindings: renesas,rzg2l-csi2: Document Renesas RZ/G3E CSI-2 block

Document the CSI-2 block which is part of CRU found in Renesas RZ/G3E
SoC.

The CSI-2 block on the RZ/G3E SoC is identical to one found on the
RZ/V2H(P) SoC.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://lore.kernel.org/r/20250411170624.472257-3-tommaso.merciai.xr@bp.renesas.com


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