dt-bindings: arm: fsl: Document i.MX7ULP Embedded Artists COM board

Add an entry for the Embedded Artists i.MX7ULP COM board.
Signed-off-by: NFabio Estevam <festevam@gmail.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -266,6 +266,7 @@ properties:
       - description: i.MX7ULP based Boards
         items:
           - enum:
+              - ea,imx7ulp-com           # i.MX7ULP Embedded Artists COM Board
               - fsl,imx7ulp-evk           # i.MX7ULP Evaluation Kit
           - const: fsl,imx7ulp