dt-bindings: memory: renesas,rpc-if: Document RZ/V2L SoC

Document RZ/V2L RPC-IF bindings. RZ/V2L RPC-IF is identical to one found
on the RZ/G2L SoC. No driver changes are required as generic compatible
string "renesas,rzg2l-rpc-if" will be used as a fallback.

While at it, drop the comment "# RZ/G2L family" for "renesas,rzg2l-rpc-if"
compatible string as this will avoid changing the line for every new SoC
addition.
Signed-off-by: NLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: NBiju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20220301123527.15950-1-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

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

@@ -40,7 +40,8 @@ properties:
       - items:
           - enum:
               - renesas,r9a07g044-rpc-if      # RZ/G2{L,LC}
-          - const: renesas,rzg2l-rpc-if       # RZ/G2L family
+              - renesas,r9a07g054-rpc-if      # RZ/V2L
+          - const: renesas,rzg2l-rpc-if
 
   reg:
     items: