regulator: rt4801: Specify additionalProperties: false

Reported-by: NRob Herring <robh@kernel.org>
Signed-off-by: NMark Brown <broonie@kernel.org>
Reviewed-by: NRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20200825101250.9485-1-broonie@kernel.orgSigned-off-by: NMark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/regulator/richtek,rt4801-regulator.yaml

@@ -49,6 +49,8 @@ required:
   - compatible
   - reg
 
+additionalProperties: false
+
 examples:
   - |
     i2c {