dt-bindings: pwm: renesas,pwm-rcar: Add r8a779h0 support

Document support for the PWM timers in the Renesas R-Car V4M (R8A779H0)
SoC.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20240725193803.14130-5-wsa+renesas@sang-engineering.comSigned-off-by: Uwe Kleine-König <ukleinek@kernel.org>

Documentation/devicetree/bindings/pwm/renesas,pwm-rcar.yaml

@@ -37,6 +37,7 @@ properties:
           - renesas,pwm-r8a77995  # R-Car D3
           - renesas,pwm-r8a779a0  # R-Car V3U
           - renesas,pwm-r8a779g0  # R-Car V4H
+          - renesas,pwm-r8a779h0  # R-Car V4M
       - const: renesas,pwm-rcar
 
   reg: