spi: renesas,sh-msiof: Add r8a7742 support

Document RZ/G1H (R8A7742) SoC bindings.

Signed-off-by: Lad Prabhakar <[email protected]>
Reviewed-by: Marian-Cristian Rotariu <[email protected]>
Reviewed-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/r/1591736054-568-2-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Mark Brown <[email protected]>

Author: prabhakarlad

Documentation/devicetree/bindings/spi/renesas,sh-msiof.yaml

@@ -21,6 +21,7 @@ properties:
                                             # device
       - items:
           - enum:
+              - renesas,msiof-r8a7742       # RZ/G1H
               - renesas,msiof-r8a7743       # RZ/G1M
               - renesas,msiof-r8a7744       # RZ/G1N
               - renesas,msiof-r8a7745       # RZ/G1E