dt-bindings: memory: renesas,rpc-if: Document R-Car H3/M3/E3 support

Document support for the SPI Multi I/O Bus Controller (RPC-IF) in the
R-Car H3, M3-W, M3-W+, M3-N, and E3 SoCs.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/3784b6cb76a008fb56d6cb4ba228d78c77e710fa.1648546583.git.geert+renesas@glider.be
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

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

@@ -31,8 +31,13 @@ properties:
               - renesas,r8a774b1-rpc-if       # RZ/G2N
               - renesas,r8a774c0-rpc-if       # RZ/G2E
               - renesas,r8a774e1-rpc-if       # RZ/G2H
+              - renesas,r8a7795-rpc-if        # R-Car H3
+              - renesas,r8a7796-rpc-if        # R-Car M3-W
+              - renesas,r8a77961-rpc-if       # R-Car M3-W+
+              - renesas,r8a77965-rpc-if       # R-Car M3-N
               - renesas,r8a77970-rpc-if       # R-Car V3M
               - renesas,r8a77980-rpc-if       # R-Car V3H
+              - renesas,r8a77990-rpc-if       # R-Car E3
               - renesas,r8a77995-rpc-if       # R-Car D3
               - 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