[PATCH -next] ASoC: dwc: Fix -Wmissing-prototypes warnings

[YueHaibing]

while CONFIG_SND_DESIGNWARE_PCM is not set, building with W=1 shows this:

sound/soc/dwc/local.h:127:6: warning: no previous prototype for ‘dw_pcm_push_tx’ [-Wmissing-prototypes]
 void dw_pcm_push_tx(struct dw_i2s_dev *dev) { }
      ^~~~~~~~~~~~~~
sound/soc/dwc/local.h:128:6: warning: no previous prototype for ‘dw_pcm_pop_rx’ [-Wmissing-prototypes]
 void dw_pcm_pop_rx(struct dw_i2s_dev *dev) { }
      ^~~~~~~~~~~~~
sound/soc/dwc/local.h:129:5: warning: no previous prototype for ‘dw_pcm_register’ [-Wmissing-prototypes]
 int dw_pcm_register(struct platform_device *pdev)
     ^~~~~~~~~~~~~~~

Change these to inline functions to fix the warnings.

Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 sound/soc/dwc/local.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/sound/soc/dwc/local.h b/sound/soc/dwc/local.h
index 91dc70a826f8..1c361eb6127e 100644
--- a/sound/soc/dwc/local.h
+++ b/sound/soc/dwc/local.h
@@ -124,9 +124,9 @@ void dw_pcm_push_tx(struct dw_i2s_dev *dev);
 void dw_pcm_pop_rx(struct dw_i2s_dev *dev);
 int dw_pcm_register(struct platform_device *pdev);
 #else
-void dw_pcm_push_tx(struct dw_i2s_dev *dev) { }
-void dw_pcm_pop_rx(struct dw_i2s_dev *dev) { }
-int dw_pcm_register(struct platform_device *pdev)
+static inline void dw_pcm_push_tx(struct dw_i2s_dev *dev) { }
+static inline void dw_pcm_pop_rx(struct dw_i2s_dev *dev) { }
+static inline int dw_pcm_register(struct platform_device *pdev)
 {
 	return -EINVAL;
 }
-- 
2.17.1