dt-bindings: net: renesas,ravb: Add support for r8a774e1 SoC

Document RZ/G2H (R8A774E1) SoC bindings.
Signed-off-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Sergei Shtylyov <sergei.shtylyov@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/renesas,ravb.txt

@@ -21,6 +21,7 @@ Required properties:
       - "renesas,etheravb-r8a774a1" for the R8A774A1 SoC.
       - "renesas,etheravb-r8a774b1" for the R8A774B1 SoC.
       - "renesas,etheravb-r8a774c0" for the R8A774C0 SoC.
+      - "renesas,etheravb-r8a774e1" for the R8A774E1 SoC.
       - "renesas,etheravb-r8a7795" for the R8A7795 SoC.
       - "renesas,etheravb-r8a7796" for the R8A77960 SoC.
       - "renesas,etheravb-r8a77961" for the R8A77961 SoC.