dt-bindings: arm: amlogic: add SEI Robotics SEI610 bindings

Add the compatible for the Amlogic SM1 Based SEI610 board.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>

Documentation/devicetree/bindings/arm/amlogic.yaml

@@ -152,5 +152,7 @@ properties:
 
       - description: Boards with the Amlogic Meson SM1 S905X3 SoC
         items:
+          - enum:
+              - seirobotics,sei610
           - const: amlogic,sm1
 ...