dt-bindings: net: renesas,etheravb: Document RZ/V2L SoC

Document Gigabit Ethernet IP found on RZ/V2L SoC. Gigabit Ethernet
Interface is identical to one found on the RZ/G2L SoC. No driver changes
are required as generic compatible string "renesas,rzg2l-gbeth" will be
used as a fallback.
Signed-off-by: NBiju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: NLad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Acked-by: NRob Herring <robh@kernel.org>
Reviewed-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/renesas,etheravb.yaml

@@ -46,7 +46,8 @@ properties:
       - items:
           - enum:
               - renesas,r9a07g044-gbeth # RZ/G2{L,LC}
-          - const: renesas,rzg2l-gbeth  # RZ/G2L
+              - renesas,r9a07g054-gbeth # RZ/V2L
+          - const: renesas,rzg2l-gbeth  # RZ/{G2L,V2L} family
 
   reg: true