[PATCH -next] drm/i2c/tda998x: Make tda998x_audio_digital_mute static

[Samuel Zou]

Fix the following sparse warning:

drivers/gpu/drm/i2c/tda998x_drv.c:1136:5: warning:
symbol 'tda998x_audio_digital_mute' was not declared. Should it be static?

Reported-by: Hulk Robot <hulkci at huawei.com>
Signed-off-by: Samuel Zou <zou_wei at huawei.com>
---
 drivers/gpu/drm/i2c/tda998x_drv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index 3c90d7a..9517f52 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -1133,7 +1133,8 @@ static void tda998x_audio_shutdown(struct device *dev, void *data)
 	mutex_unlock(&priv->audio_mutex);
 }
 
-int tda998x_audio_digital_mute(struct device *dev, void *data, bool enable)
+static int tda998x_audio_digital_mute(struct device *dev, void *data,
+				      bool enable)
 {
 	struct tda998x_priv *priv = dev_get_drvdata(dev);
 
-- 
2.6.2