dt-bindings: interrupt-controller/uniphier-aidet: Add bindings for NX1 SoC

Update uniphier-aidet binding document for UniPhier NX1 SoC.
Signed-off-by: NKunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1653023822-19229-2-git-send-email-hayashi.kunihiko@socionext.com

Documentation/devicetree/bindings/interrupt-controller/socionext,uniphier-aidet.yaml

@@ -30,6 +30,7 @@ properties:
       - socionext,uniphier-ld11-aidet
       - socionext,uniphier-ld20-aidet
       - socionext,uniphier-pxs3-aidet
+      - socionext,uniphier-nx1-aidet
 
   reg:
     maxItems: 1