dt-bindings: arm: fsl: document Kontron SMARC-sAMX6i boards

The Kontron SMARC-sAMX6i is just a module. There was no device tree for
an actual board for now. Document the binding to use the module on the
evaluation carrier.

Acked-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Michael Walle <[email protected]>
Signed-off-by: Shawn Guo <[email protected]>

Author: mwalle

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -362,6 +362,12 @@ properties:
           - const: gw,ventana
           - const: fsl,imx6q
 
+      - description: i.MX6Q Kontron SMARC-sAMX6i on SMARC Eval Carrier 2.0
+        items:
+          - const: kontron,imx6q-samx6i-ads2
+          - const: kontron,imx6q-samx6i
+          - const: fsl,imx6q
+
       - description: i.MX6Q PHYTEC phyBOARD-Mira
         items:
           - enum:
@@ -543,6 +549,12 @@ properties:
           - const: gw,ventana
           - const: fsl,imx6dl
 
+      - description: i.MX6DL Kontron SMARC-sAMX6i on SMARC Eval Carrier 2.0
+        items:
+          - const: kontron,imx6dl-samx6i-ads2
+          - const: kontron,imx6dl-samx6i
+          - const: fsl,imx6dl
+
       - description: i.MX6DL PHYTEC phyBOARD-Mira
         items:
           - enum: