dt-bindings: net: ravb: Add support for r8a7744 SoC

Document RZ/G1N (R8A7744) SoC bindings.
Signed-off-by: NBiju Das <biju.das@bp.renesas.com>
Reviewed-by: NFabrizio Castro <fabrizio.castro@bp.renesas.com>
Reviewed-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

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

@@ -6,6 +6,7 @@ interface contains.
 Required properties:
 - compatible: Must contain one or more of the following:
       - "renesas,etheravb-r8a7743" for the R8A7743 SoC.
+      - "renesas,etheravb-r8a7744" for the R8A7744 SoC.
       - "renesas,etheravb-r8a7745" for the R8A7745 SoC.
       - "renesas,etheravb-r8a77470" for the R8A77470 SoC.
       - "renesas,etheravb-r8a7790" for the R8A7790 SoC.