dt-bindings: hwmon: nuvoton,nct6775: Add compatible value for NCT6799

While NCT6799 is mostly compatible to NCT6798, it needs a separate
compatible entry because it is not completely compatible and does
require chip specific code in the driver.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Zev Weiss <zev@bewilderbeest.net>
Link: https://lore.kernel.org/r/20240221155158.2234898-1-linux@roeck-us.netSigned-off-by: Guenter Roeck <linux@roeck-us.net>

Documentation/devicetree/bindings/hwmon/nuvoton,nct6775.yaml

@@ -25,6 +25,7 @@ properties:
       - nuvoton,nct6796
       - nuvoton,nct6797
       - nuvoton,nct6798
+      - nuvoton,nct6799
 
   reg:
     maxItems: 1