dt-bindings: arm: fsl: Add MSC SM2S-IMX8PLUS SoM and SM2-MB-EP1 Carrier

Add DT compatible strings for a combination of the 14N0600E variant of
the Avnet (MSC branded) SM2S-IMX8PLUS SoM on it's own and in combination
with the SM2-MB-EP1 carrier board.
Signed-off-by: Martyn Welch <martyn.welch@collabora.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -936,6 +936,13 @@ properties:
               - toradex,verdin-imx8mp-wifi  # Verdin iMX8M Plus Wi-Fi / BT Modules
           - const: fsl,imx8mp
 
+      - description: Avnet (MSC Branded) Boards with SM2S i.MX8M Plus Modules
+        items:
+          - const: avnet,sm2s-imx8mp-14N0600E-ep1 # SM2S-IMX8PLUS-14N0600E on SM2-MB-EP1 Carrier Board
+          - const: avnet,sm2s-imx8mp-14N0600E     # 14N0600E variant of SM2S-IMX8PLUS SoM
+          - const: avnet,sm2s-imx8mp              # SM2S-IMX8PLUS SoM
+          - const: fsl,imx8mp
+
       - description: Engicam i.Core MX8M Plus SoM based boards
         items:
           - enum: