pinctrl: sh-pfc: sh7264: Fix Port K I/O Register 0 definition

The register definition block for the Port K I/O Register is
accidentally using the defines for Port J.  Replace them by the proper
Port K defines.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20191218194812.12741-3-geert+renesas@glider.be