ASoC: dt-bindings: cs4270: use 'reset-gpios' rather than 'reset-gpio'

Bindings should use 'reset-gpios', not 'reset-gpio'. The driver needs to
switch to the gpiod consume API to handle this correctly.

Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Mark Brown <broonie@kernel.org>