dt-bindings: arm: fsl: Add Kontron i.MX6UL N6310 compatibles

Add the compatibles for Kontron i.MX6UL N6310 SoM and boards.
Signed-off-by: NKrzysztof Kozlowski <krzk@kernel.org>
Reviewed-by: NRob Herring <robh@kernel.org>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -161,6 +161,20 @@ properties:
         items:
           - enum:
               - fsl,imx6ul-14x14-evk      # i.MX6 UltraLite 14x14 EVK Board
+              - kontron,imx6ul-n6310-som  # Kontron N6310 SOM
+          - const: fsl,imx6ul
+
+      - description: Kontron N6310 S Board
+        items:
+          - const: kontron,imx6ul-n6310-s
+          - const: kontron,imx6ul-n6310-som
+          - const: fsl,imx6ul
+
+      - description: Kontron N6310 S 43 Board
+        items:
+          - const: kontron,imx6ul-n6310-s-43
+          - const: kontron,imx6ul-n6310-s
+          - const: kontron,imx6ul-n6310-som
           - const: fsl,imx6ul
 
       - description: i.MX6ULL based Boards