ASoC: rt5677: Refactor GPIO support code

ASoC: rt5677: Refactor GPIO support code

After compiler complains:

  sound/soc/codecs/rt5677.c:4748:30: warning: dubious: x | !y

I looked into the code and realized that we can refactor it
for better reading and fixing above issue at the same time.
Hence this change. It does not imply any functional changes.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230630172155.83754-2-andriy.shevchenko@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>