dts: bindings: ospi: add ospim io ports

Adds properties to configure OCTOSPI IO
Manager data lines. That allows to use
any `IOLowPort` and `IOHightPort`.

Note: OSPIM requires additional clock to be enabled.
      Please refer to Reference Manual.
      Extra clock can be enabled in devicetree.

Signed-off-by: Georgij Cernysiov <geo.cgv@gmail.com>