dt-bindings: hwmon: lm90: Add support for NCT7716, NCT7717 and NCT7718

Add support for the Nuvoton NCT7716/7717/7718 thermal sensors.

NCT7716 and NCT7717 do not support to add temperature offset.
The maximum offset supported by NCT7718 is 127875 millicelsius

Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Ming Yu <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Guenter Roeck <[e-mail]>

Documentation/devicetree/bindings/hwmon/national,lm90.yaml

···
       - national,lm89
       - national,lm90
       - national,lm99
+      - nuvoton,nct7716
+      - nuvoton,nct7717
+      - nuvoton,nct7718
       - nxp,sa56004
       - onnn,nct1008
       - ti,tmp451
···
               - dallas,max6659
               - dallas,max6695
               - dallas,max6696
+              - nuvoton,nct7716
+              - nuvoton,nct7717
     then:
       patternProperties:
         "^channel@([0-2])$":
···
               - national,lm89
               - national,lm90
               - national,lm99
+              - nuvoton,nct7718
               - nxp,sa56004
               - winbond,w83l771
     then: