[PATCH] drm/i2c/tda998x: mark symbol static where possible

[Arnd Bergmann]

On Saturday, October 22, 2016 5:14:42 PM CEST Baoyou Xie wrote:
> We get 1 warning when building kernel with W=1:
> drivers/gpu/drm/i2c/tda998x_drv.c:1292:5: warning: no previous prototype for 'tda998x_audio_digital_mute' [-Wmissing-prototypes]
> 
> In fact, this function is only used in the file in which it is
> declared and don't need a declaration, but can be made static.
> So this patch marks this function with 'static'.
> 
> Signed-off-by: Baoyou Xie <baoyou.xie at linaro.org>
> 

Reviewed-by: Arnd Bergmann <arnd at arndb.de>