dt-bindings: pwm: renesas,pwm-rcar: Add r8a7742 support

Document RZ/G1H (R8A7742) SoC bindings.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

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

@@ -13,6 +13,7 @@ properties:
   compatible:
     items:
       - enum:
+          - renesas,pwm-r8a7742   # RZ/G1H
           - renesas,pwm-r8a7743   # RZ/G1M
           - renesas,pwm-r8a7744   # RZ/G1N
           - renesas,pwm-r8a7745   # RZ/G1E