dt-bindings: mmc: remove identical phrase in disable-wp text

    description:

      When set, no physical write-protect line is present. This

      property should only be specified when the controller has a

      dedicated write-protect detection logic. If a GPIO is always

      used for the write-protect detection. If a GPIO is always used

      dedicated write-protect detection logic. If a GPIO is always used

      for the write-protect detection logic, it is sufficient to not

      specify the wp-gpios property in the absence of a write-protect

      line.