dt-bindings: serial: xlnx,opb-uartlite: Drop 'contains' from 'xlnx,use-parity'

'contains' applies to arrays, but 'xlnx,use-parity' is a scalar. So drop
'contains' from the 'if' schema.

Signed-off-by: Rob Herring <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: robherring

Documentation/devicetree/bindings/serial/xlnx,opb-uartlite.yaml

@@ -67,8 +67,7 @@ allOf:
   - if:
       properties:
         xlnx,use-parity:
-          contains:
-            const: 1
+          const: 1
     then:
       required:
         - xlnx,odd-parity