Use str_write_read() and str_read_write() from string_choices.h.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230703185222.50554-3-andriy.shevchenko@linux.intel.comSigned-off-by: Benjamin Tissoires <bentiss@kernel.org>