ASoC: wm_adsp: Remove unused member of struct wm_coeff_ctl_ops

The xinfo member of struct wm_coeff_ctl_ops is never used.
Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm_adsp.c

@@ -482,8 +482,6 @@ struct wm_coeff_ctl_ops {
 		    struct snd_ctl_elem_value *ucontrol);
 	int (*xput)(struct snd_kcontrol *kcontrol,
 		    struct snd_ctl_elem_value *ucontrol);
-	int (*xinfo)(struct snd_kcontrol *kcontrol,
-		     struct snd_ctl_elem_info *uinfo);
 };
 
 struct wm_coeff_ctl {