ASoC: nau8822: set NAU8822_REFIMP_80K only once

Following bias state machine logic this bit is set twice before playback.
This change makes sure this bit set is set only once.
Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Suggested-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com>
Link: https://msgid.link/r/20240613084652.13113-3-andrejs.cainikovs@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/nau8822.c

@@ -942,6 +942,8 @@ static int nau8822_set_bias_level(struct snd_soc_component *component,
 {
 	switch (level) {
 	case SND_SOC_BIAS_ON:
+		break;
+
 	case SND_SOC_BIAS_PREPARE:
 		snd_soc_component_update_bits(component,
 			NAU8822_REG_POWER_MANAGEMENT_1,