dt-bindings: mfd: atmel,sama5d2-flexcom: Add microchip,lan9691-flexcom

Add binding documentation for Microchip LAN969x.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@tuxon.dev>
Link: https://patch.msgid.link/20251229184004.571837-3-robert.marko@sartura.hr
Signed-off-by: Lee Jones <lee@kernel.org>

Author: robimarko

Documentation/devicetree/bindings/mfd/atmel,sama5d2-flexcom.yaml

@@ -20,6 +20,7 @@ properties:
       - const: atmel,sama5d2-flexcom
       - items:
           - enum:
+              - microchip,lan9691-flexcom
               - microchip,sam9x7-flexcom
               - microchip,sama7d65-flexcom
               - microchip,sama7g5-flexcom