ASoC: wm_adsp: remove "ctl" from list on error in wm_adsp_create_control()

The error handling frees "ctl" but it's still on the "dsp->ctl_list"
list so that could result in a use after free.  Remove it from the list
before returning.

Fixes: 2323736d ("ASoC: wm_adsp: Add basic support for rev 1 firmware file format")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/X9B0keV/02wrx9Xs@mwandaSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm_adsp.c

@@ -1519,7 +1519,7 @@ static int wm_adsp_create_control(struct wm_adsp *dsp,
 	ctl_work = kzalloc(sizeof(*ctl_work), GFP_KERNEL);
 	if (!ctl_work) {
 		ret = -ENOMEM;
-		goto err_ctl_cache;
+		goto err_list_del;
 	}
 
 	ctl_work->dsp = dsp;
@@ -1529,7 +1529,8 @@ static int wm_adsp_create_control(struct wm_adsp *dsp,
 
 	return 0;
 
-err_ctl_cache:
+err_list_del:
+	list_del(&ctl->list);
 	kfree(ctl->cache);
 err_ctl_subname:
 	kfree(ctl->subname);