dt-bindings: arm: fsl: Add Emtop SoM & Baseboard

Add support for i.MX8MM based Emtop SOM-IMX8MMLPD4 and
IMX8MM Mini Baseboard

Signed-off-by: Himanshu Bhavani <himanshu.bhavani@siliconsignals.io>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Author: Himanshu Bhavani

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -925,6 +925,12 @@ properties:
               - prt,prt8mm                # i.MX8MM Protonic PRT8MM Board
           - const: fsl,imx8mm
 
+      - description: Emtop i.MX8MM based Boards
+        items:
+          - const: ees,imx8mm-emtop-baseboard			# i.MX8MM Emtop SoM on i.MX8M Mini Baseboard V1
+          - const: ees,imx8mm-emtop-som			# i.MX8MM Emtop SOM-IMX8MMLPD4 module
+          - const: fsl,imx8mm
+
       - description: Engicam i.Core MX8M Mini SoM based boards
         items:
           - enum: