ASoC: dt-bindings: renesas: add R8A779G0 V4H

Document R-Car V4H (R8A779G0), and R-Car Gen4 SoC bindings.

Link: https://lore.kernel.org/r/87zga6t5r4.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87pmau5ejk.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/renesas,rsnd.yaml

@@ -46,6 +46,10 @@ properties:
               - renesas,rcar_sound-r8a77990  # R-Car E3
               - renesas,rcar_sound-r8a77995  # R-Car D3
           - const: renesas,rcar_sound-gen3
+      # for Gen4 SoC
+      - items:
+          - const: renesas,rcar_sound-r8a779g0  # R-Car V4H
+          - const: renesas,rcar_sound-gen4
       # for Generic
       - enum:
           - renesas,rcar_sound-gen1