ASoC: wm_adsp: Remove unused control callback structure

This callback structure has never been used and it is not clear why it
was added in the first place. Remove it to clear up the code a little.

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20210211172106.16258-1-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm_adsp.c

@@ -595,13 +595,6 @@ static const struct {
 	[WM_ADSP_FW_MISC] =     { .file = "misc" },
 };
 
-struct wm_coeff_ctl_ops {
-	int (*xget)(struct snd_kcontrol *kcontrol,
-		    struct snd_ctl_elem_value *ucontrol);
-	int (*xput)(struct snd_kcontrol *kcontrol,
-		    struct snd_ctl_elem_value *ucontrol);
-};
-
 struct wm_coeff_ctl {
 	const char *name;
 	const char *fw_name;
@@ -609,7 +602,6 @@ struct wm_coeff_ctl {
 	const char *subname;
 	unsigned int subname_len;
 	struct wm_adsp_alg_region alg_region;
-	struct wm_coeff_ctl_ops ops;
 	struct wm_adsp *dsp;
 	unsigned int enabled:1;
 	struct list_head list;
@@ -1497,8 +1489,6 @@ static int wm_adsp_create_control(struct wm_adsp *dsp,
 	}
 	ctl->enabled = 1;
 	ctl->set = 0;
-	ctl->ops.xget = wm_coeff_get;
-	ctl->ops.xput = wm_coeff_put;
 	ctl->dsp = dsp;
 
 	ctl->flags = flags;