drm: renesas: rz-du: Add support for RZ/V2H(P) SoC

drm: renesas: rz-du: Add support for RZ/V2H(P) SoC

The LCD controller (LCDC) on the RZ/V2H(P) SoC is composed of Frame
Compression Processor (FCPVD), Video Signal Processor (VSPD), and
Display Unit (DU).

There is one LCDC unit available on the RZ/V2H(P) SoC which is connected
to the DSI.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20250512182330.238259-3-prabhakar.mahadev-lad.rj@bp.renesas.com