dt-bindings: gpio: renesas, rcar-gpio: Add r8a7742 (RZ/G1H) support

Renesas RZ/G1H (R8A7742) SoC GPIO blocks are identical to the R-Car Gen2
family. Add support for its GPIO controllers.

Signed-off-by: Lad Prabhakar <[e-mail]>
Reviewed-by: Marian-Cristian Rotariu <[e-mail]>
Reviewed-by: Geert Uytterhoeven <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Signed-off-by: Rob Herring <[e-mail]>

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

···
 
       - items:
          - enum:
+             - renesas,gpio-r8a7742      # RZ/G1H
              - renesas,gpio-r8a7743      # RZ/G1M
              - renesas,gpio-r8a7744      # RZ/G1N
              - renesas,gpio-r8a7745      # RZ/G1E