ASoC: au1x: sync parameter naming (rate/sample_bits)

This patch syncs naming rule.

 - xxx_rates;
 + xxx_rate;

 - xxx_samplebits;
 + xxx_sample_bits;
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/87sg72olij.wl-kuninori.morimoto.gx@renesas.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/au1x/i2sc.c

@@ -210,7 +210,7 @@ static const struct snd_soc_dai_ops au1xi2s_dai_ops = {
 };
 
 static struct snd_soc_dai_driver au1xi2s_dai_driver = {
-	.symmetric_rates	= 1,
+	.symmetric_rate		= 1,
 	.playback = {
 		.rates		= AU1XI2SC_RATES,
 		.formats	= AU1XI2SC_FMTS,