ALSA: ac97: make remove callback of ac97 driver void returned

Since commit fc7a6209d571 ("bus: Make remove callback return void")
forces bus_type::remove be void-returned, it doesn't make much sense
for any bus based driver implementing remove callbalk to return
non-void to its caller.

As such, change the remove function for ac97 based drivers to return
void.

Signed-off-by: Dawei Li <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Takashi Iwai <[e-mail]>

drivers/mfd/wm97xx-core.c

···
 	return ret;
 }
 
-static int wm97xx_ac97_remove(struct ac97_codec_device *adev)
+static void wm97xx_ac97_remove(struct ac97_codec_device *adev)
 {
 	struct wm97xx_priv *wm97xx = ac97_get_drvdata(adev);
 
 	snd_ac97_compat_release(wm97xx->ac97);
-
-	return 0;
 }
 
 static const struct ac97_id wm97xx_ac97_ids[] = {

include/sound/ac97/codec.h

···
 struct ac97_codec_driver {
 	struct device_driver	driver;
 	int			(*probe)(struct ac97_codec_device *);
-	int			(*remove)(struct ac97_codec_device *);
+	void			(*remove)(struct ac97_codec_device *dev);
 	void			(*shutdown)(struct ac97_codec_device *);
 	const struct ac97_id	*id_table;
 };

sound/ac97/bus.c

···
 	if (ret < 0)
 		return;
 
-	ret = adrv->remove(adev);
+	adrv->remove(adev);
 	pm_runtime_put_noidle(dev);
-	if (ret == 0)
-		ac97_put_disable_clk(adev);
+	ac97_put_disable_clk(adev);
 
 	pm_runtime_disable(dev);
 }