[ALSA] more section mismatches

Something about __init_or_module isn't working as expected (?).
CONFIG_HOTPLUG=y
CONFIG_MODULES=n
Fix shared init/exit code helper:
WARNING: sound/built-in.o(.exit.text+0x243): Section mismatch: reference to .init.text: (between 'alsa_card_mpu401_exit' and 'ac97_bus_exit')
WARNING: sound/built-in.o(.exit.text+0x21b): Section mismatch: reference to .init.text: (between 'alsa_card_dummy_exit' and 'alsa_card_serial_exit')

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
diff --git a/sound/drivers/dummy.c b/sound/drivers/dummy.c
index a0f28f5..4360ae9 100644
--- a/sound/drivers/dummy.c
+++ b/sound/drivers/dummy.c
@@ -659,7 +659,7 @@
 	},
 };
 
-static void __init_or_module snd_dummy_unregister_all(void)
+static void snd_dummy_unregister_all(void)
 {
 	int i;