ASoC: rt1015: modify some structure to be static.

Modify rt1015_aif_dai_ops and rt1015_dai[] to be static.
Signed-off-by: Jack Yu <jack.yu@realtek.com>
Link: https://lore.kernel.org/r/20200227020637.15135-1-jack.yu@realtek.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rt1015.c

@@ -841,12 +841,12 @@ static void rt1015_remove(struct snd_soc_component *component)
 #define RT1015_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
 			SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S8)
 
-struct snd_soc_dai_ops rt1015_aif_dai_ops = {
+static struct snd_soc_dai_ops rt1015_aif_dai_ops = {
 	.hw_params = rt1015_hw_params,
 	.set_fmt = rt1015_set_dai_fmt,
 };
 
-struct snd_soc_dai_driver rt1015_dai[] = {
+static struct snd_soc_dai_driver rt1015_dai[] = {
 	{
 		.name = "rt1015-aif",
 		.id = 0,