ASoC: nau8325: Revise soc_enum structure definition.

This patch is modified nau8325_dac_oversampl_enum enumerated.
Use SOC_VALUE_ENUM instead to hide empty (presumably invalid) options.

Signed-off-by: Seven Lee <wtli@nuvoton.com>
Link: https://msgid.link/r/20240401104753.3432507-1-wtli@nuvoton.com


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