dt-bindings: ARM: at91: Document Microchip SAMA5D29 Curiosity

Document device tree binding of SAMA5D29 Curiosity, from Microchip.

Reviewed-by: Mihai Sain <mihai.sain@microchip.com>
Signed-off-by: Andrei Simion <andrei.simion@microchip.com>

Author: Andrei Simion

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

@@ -79,6 +79,13 @@ properties:
           - const: atmel,sama5d2
           - const: atmel,sama5
 
+      - description: Microchip SAMA5D29 Curiosity
+        items:
+          - const: microchip,sama5d29-curiosity
+          - const: atmel,sama5d29
+          - const: atmel,sama5d2
+          - const: atmel,sama5
+
       - items:
           - const: atmel,sama5d27
           - const: atmel,sama5d2