dt-bindings: arm: fsl: Add Kontron BL i.MX8MM OSM-S board

Add bindings for the Kontron BL i.MX8MM OSM-S board.
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -825,6 +825,7 @@ properties:
               - gw,imx8mm-gw7902          # i.MX8MM Gateworks Board
               - gw,imx8mm-gw7903          # i.MX8MM Gateworks Board
               - kontron,imx8mm-sl         # i.MX8MM Kontron SL (N801X) SOM
+              - kontron,imx8mm-osm-s      # i.MX8MM Kontron OSM-S (N802X) SOM
               - menlo,mx8menlo            # i.MX8MM Menlo board with Verdin SoM
               - toradex,verdin-imx8mm     # Verdin iMX8M Mini Modules
               - toradex,verdin-imx8mm-nonwifi  # Verdin iMX8M Mini Modules without Wi-Fi / BT
@@ -847,6 +848,12 @@ properties:
           - const: kontron,imx8mm-sl
           - const: fsl,imx8mm
 
+      - description: Kontron BL i.MX8MM OSM-S (N802X S) Board
+        items:
+          - const: kontron,imx8mm-bl-osm-s
+          - const: kontron,imx8mm-osm-s
+          - const: fsl,imx8mm
+
       - description: Toradex Boards with Verdin iMX8M Mini Modules
         items:
           - enum: