[ALSA] make snd-powermac load even when it can't bind the device

This patch makes snd-powermac load when it can't bind the device right
away. That's the expected behaviour for hotplugging, but fixes an
important problem I was seeing with doing a modprobe snd-powermac with
a version that refuses loading on machines with layout-id: snd-powermac
would create a bunch of uevents and then refuse to load, the uevents
causing udev to reload it again, ad eternum.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>

sound/ppc/powermac.c

@@ -181,21 +181,14 @@ static int __init alsa_card_pmac_init(void)
 	if ((err = platform_driver_register(&snd_pmac_driver)) < 0)
 		return err;
 	device = platform_device_register_simple(SND_PMAC_DRIVER, -1, NULL, 0);
-	if (!IS_ERR(device)) {
-		if (platform_get_drvdata(device))
-			return 0;
-		platform_device_unregister(device);
-		err = -ENODEV;
-	} else
-		err = PTR_ERR(device);
-	platform_driver_unregister(&snd_pmac_driver);
-	return err;
+	return 0;
 
 }
 
 static void __exit alsa_card_pmac_exit(void)
 {
-	platform_device_unregister(device);
+	if (!IS_ERR(device))
+		platform_device_unregister(device);
 	platform_driver_unregister(&snd_pmac_driver);
 }