dt-bindings: arm: add sama5d2-icp board

Add documentation for SAMA5D2-ICP board.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>

Author: Codrin Ciubotariu

Documentation/devicetree/bindings/arm/atmel-at91.yaml

@@ -77,6 +77,13 @@ properties:
           - const: atmel,sama5d2
           - const: atmel,sama5
 
+      - description: Microchip SAMA5D27 Industrial Connectivity Platform
+        items:
+          - const: microchip,sama5d2-icp
+          - const: atmel,sama5d27
+          - const: atmel,sama5d2
+          - const: atmel,sama5
+
       - items:
           - const: atmel,sama5d27
           - const: atmel,sama5d2