ALSA: aoa: make remove callback of soundbus driver void returned

Since commit fc7a6209 ("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 soundbus based drivers to
return void.
Signed-off-by: Dawei Li <set_pte_at@outlook.com>
Link: https://lore.kernel.org/r/TYCP286MB23234FED40A3AE6797DEBAB7CAFB9@TYCP286MB2323.JPNP286.PROD.OUTLOOK.COMSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/aoa/fabrics/layout.c

@@ -1094,7 +1094,7 @@ static int aoa_fabric_layout_probe(struct soundbus_dev *sdev)
 	return -ENODEV;
 }
 
-static int aoa_fabric_layout_remove(struct soundbus_dev *sdev)
+static void aoa_fabric_layout_remove(struct soundbus_dev *sdev)
 {
 	struct layout_dev *ldev = dev_get_drvdata(&sdev->ofdev.dev);
 	int i;
@@ -1123,7 +1123,6 @@ static int aoa_fabric_layout_remove(struct soundbus_dev *sdev)
 	kfree(ldev);
 	sdev->pcmid = -1;
 	sdev->pcmname = NULL;
-	return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP

sound/aoa/soundbus/soundbus.h

@@ -185,7 +185,7 @@ struct soundbus_driver {
 	/* we don't implement any matching at all */
 
 	int	(*probe)(struct soundbus_dev* dev);
-	int	(*remove)(struct soundbus_dev* dev);
+	void	(*remove)(struct soundbus_dev *dev);
 
 	int	(*shutdown)(struct soundbus_dev* dev);