spi: renesas,sh-msiof: Add generic Gen4 and r8a779f0 support

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20220824094327.33685-2-wsa+renesas@sang-engineering.comSigned-off-by: Mark Brown <broonie@kernel.org>

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

@@ -50,6 +50,11 @@ properties:
               - renesas,msiof-r8a779a0      # R-Car V3U
           - const: renesas,rcar-gen3-msiof  # generic R-Car Gen3 and RZ/G2
                                             # compatible device
+      - items:
+          - enum:
+              - renesas,msiof-r8a779f0      # R-Car S4-8
+          - const: renesas,rcar-gen4-msiof  # generic R-Car Gen4
+                                            # compatible device
       - items:
           - const: renesas,sh-msiof  # deprecated