dt-bindings: memory: renesas,rpc-if: Document R-Car V4H support

Document support for the SPI Multi I/O Bus Controller (RPC-IF) in the
R-Car V4H SoC.
Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/c268cb4497cbe79773bb6568f36c37adc6fb5bbe.1665582645.git.geert+renesas@glider.beSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Documentation/devicetree/bindings/memory-controllers/renesas,rpc-if.yaml

@@ -42,6 +42,11 @@ properties:
               - renesas,r8a779a0-rpc-if       # R-Car V3U
           - const: renesas,rcar-gen3-rpc-if   # a generic R-Car gen3 or RZ/G2{E,H,M,N} device
 
+      - items:
+          - enum:
+              - renesas,r8a779g0-rpc-if       # R-Car V4H
+          - const: renesas,rcar-gen4-rpc-if   # a generic R-Car gen4 device
+
       - items:
           - enum:
               - renesas,r9a07g043-rpc-if      # RZ/G2UL