dt-bindings: arm: Add bosch acc board

Add device tree binding for the Bosch ACC board, based on i.MX6 Dual.
Signed-off-by: Philip Oberfichtner <pro@denx.de>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

Documentation/devicetree/bindings/arm/fsl.yaml

@@ -192,6 +192,7 @@ properties:
         items:
           - enum:
               - auvidea,h100              # Auvidea H100
+              - bosch,imx6q-acc           # Bosch ACC i.MX6 Dual
               - boundary,imx6q-nitrogen6_max
               - boundary,imx6q-nitrogen6_som2
               - boundary,imx6q-nitrogen6x