dt-bindings: ata: pata-common: Add missing additionalProperties on child nodes

The PATA child node schema is missing constraints to prevent unknown
properties. As none of the users of this common binding extend the child
nodes with additional properties, adding "additionalProperties: false"
here is sufficient.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Signed-off-by: Damien Le Moal <dlemoal@kernel.org>

Documentation/devicetree/bindings/ata/pata-common.yaml

@@ -38,6 +38,7 @@ patternProperties:
       ID number 0 and the slave drive will have ID number 1. The PATA port
       nodes will be named "ide-port".
     type: object
+    additionalProperties: false
 
     properties:
       reg: