mux: gpio: Make it OF independent

Module doesn't use OF APIs anyhow, make it OF independent by replacing
headers and dropping useless of_match_ptr() call.

Acked-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20210330193325.68362-2-andriy.shevchenko@linux.intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>