dt-bindings: net: ave: Add bindings for NX1 SoC

Update AVE binding document for UniPhier NX1 SoC.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/socionext,uniphier-ave4.yaml

@@ -24,6 +24,7 @@ properties:
       - socionext,uniphier-ld11-ave4
       - socionext,uniphier-ld20-ave4
       - socionext,uniphier-pxs3-ave4
+      - socionext,uniphier-nx1-ave4
 
   reg:
     maxItems: 1