ASoC: wm_adsp: simplify return value

cppcheck warning:

sound/soc/codecs/wm_adsp.c:2092:9: warning: Identical condition and
return expression 'ret', return value is always 0
[identicalConditionAfterEarlyExit]
return ret;
^
sound/soc/codecs/wm_adsp.c:2070:6: note: If condition 'ret' is true,
the function will return/exit
if (ret)
^
sound/soc/codecs/wm_adsp.c:2092:9: note: Returning identical
expression 'ret'
return ret;
^

Signed-off-by: Pierre-Louis Bossart <[e-mail]>
Acked-by: Charles Keepax <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/wm_adsp.c

···
 	snd_ctl_notify(dsp->component->card->snd_card,
 		       SNDRV_CTL_EVENT_MASK_VALUE, &kcontrol->id);
 
-	return ret;
+	return 0;
 }
 EXPORT_SYMBOL_GPL(wm_adsp_write_ctl);