dt-bindings: ARM: at91: Document SAMA5D27 WLSOM1 and Evaluation Kit

Document device tree binding of SAMA5D27 WLSOM1 - Wireless module;
and SAMA5D27 WLSOM1 EK - Wireless module evaluation kit, from Microchip.
Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
Link: https://lore.kernel.org/r/1573543139-8533-3-git-send-email-eugen.hristev@microchip.comReviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

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

@@ -52,6 +52,21 @@ properties:
           - const: atmel,sama5d2
           - const: atmel,sama5
 
+      - description: Microchip SAMA5D27 WLSOM1
+        items:
+          - const: microchip,sama5d27-wlsom1
+          - const: atmel,sama5d27
+          - const: atmel,sama5d2
+          - const: atmel,sama5
+
+      - description: Microchip SAMA5D27 WLSOM1 Evaluation Kit
+        items:
+          - const: microchip,sama5d27-wlsom1-ek
+          - const: microchip,sama5d27-wlsom1
+          - const: atmel,sama5d27
+          - const: atmel,sama5d2
+          - const: atmel,sama5
+
       - items:
           - const: atmel,sama5d27
           - const: atmel,sama5d2