dt-bindings: rtc: at91rm9200: add microchip,sama7d65-rtc

Add SAMA7D65 RTC compatible to DT bindings documentation.

Signed-off-by: Ryan Wanner <Ryan.Wanner@microchip.com>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/a274485331628be0bcf382b1ba489d4555fa49c8.1744666011.git.Ryan.Wanner@microchip.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

Author: ryan-wanner

Documentation/devicetree/bindings/rtc/atmel,at91rm9200-rtc.yaml

@@ -23,7 +23,9 @@ properties:
           - microchip,sam9x60-rtc
           - microchip,sama7g5-rtc
       - items:
-          - const: microchip,sam9x7-rtc
+          - enum:
+              - microchip,sam9x7-rtc
+              - microchip,sama7d65-rtc
           - const: microchip,sam9x60-rtc
 
   reg: