ASoC: ak5558: change function name to ak5558_reset

Change function name to ak5558_reset to match devicetree property
"reset-gpios".

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1618382024-31725-2-git-send-email-shengjiu.wang@nxp.com


Signed-off-by: Mark Brown <broonie@kernel.org>