dt-bindings: gpu: mali-bifrost: Add compatible for RZ/V2H(P) SoC

dt-bindings: gpu: mali-bifrost: Add compatible for RZ/V2H(P) SoC

Add a compatible string for the Renesas RZ/V2H(P) SoC variants that
include a Mali-G31 GPU. These variants share the same restrictions on
interrupts, clocks, and power domains as the RZ/G2L SoC, so extend
the existing schema validation accordingly.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20250218115922.407816-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>