ALSA: ice1712: wm8776.c: Remove some unused functions

Removes some functions that are not used anywhere:
snd_wm8776_set_master_mode() snd_wm8776_set_adc_if() snd_wm8776_set_dac_if()

This was partially found by using a static code analysis program called cppcheck.
Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/ice1712/wm8776.c

@@ -452,21 +452,6 @@ void snd_wm8776_resume(struct snd_wm8776 *wm)
 		snd_wm8776_write(wm, i, wm->regs[i]);
 }
 
-void snd_wm8776_set_dac_if(struct snd_wm8776 *wm, u16 dac)
-{
-	snd_wm8776_write(wm, WM8776_REG_DACIFCTRL, dac);
-}
-
-void snd_wm8776_set_adc_if(struct snd_wm8776 *wm, u16 adc)
-{
-	snd_wm8776_write(wm, WM8776_REG_ADCIFCTRL, adc);
-}
-
-void snd_wm8776_set_master_mode(struct snd_wm8776 *wm, u16 mode)
-{
-	snd_wm8776_write(wm, WM8776_REG_MSTRCTRL, mode);
-}
-
 void snd_wm8776_set_power(struct snd_wm8776 *wm, u16 power)
 {
 	snd_wm8776_write(wm, WM8776_REG_PWRDOWN, power);

sound/pci/ice1712/wm8776.h

@@ -216,9 +216,6 @@ struct snd_wm8776 {
 
 void snd_wm8776_init(struct snd_wm8776 *wm);
 void snd_wm8776_resume(struct snd_wm8776 *wm);
-void snd_wm8776_set_dac_if(struct snd_wm8776 *wm, u16 dac);
-void snd_wm8776_set_adc_if(struct snd_wm8776 *wm, u16 adc);
-void snd_wm8776_set_master_mode(struct snd_wm8776 *wm, u16 mode);
 void snd_wm8776_set_power(struct snd_wm8776 *wm, u16 power);
 void snd_wm8776_volume_restore(struct snd_wm8776 *wm);
 int snd_wm8776_build_controls(struct snd_wm8776 *wm);