[PATCH -next] ASoC: mediatek: mt2701: cHECK-fix non static symbol warning

[weiyj_lk]

From: Wei Yongjun <yongjun_...@trendmicro.com.cn>

Fixes the following sparse warning:

sound/soc/mediatek/mt2701/mt2701-afe-pcm.c:72:5: warning:
 symbol 'mt2701_dai_num_to_i2s' was not declared. Should it be static?

Signed-off-by: Wei Yongjun <yongjun_...@trendmicro.com.cn>
---
 sound/soc/mediatek/mt2701/mt2701-afe-pcm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c 
b/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
index 15522c0..34a6123 100644
--- a/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
+++ b/sound/soc/mediatek/mt2701/mt2701-afe-pcm.c
@@ -69,7 +69,7 @@ static const struct mt2701_afe_rate mt2701_afe_i2s_rates[] = {
        { .rate = 352800, .regvalue = 24 },
 };
 
-int mt2701_dai_num_to_i2s(struct mtk_base_afe *afe, int num)
+static int mt2701_dai_num_to_i2s(struct mtk_base_afe *afe, int num)
 {
        int val = num - MT2701_IO_I2S;