[ALSA] Clean up EXPORT_SYMBOL()s in snd module

Move EXPORT_SYMBOL()s to places adjacent to functions/variables.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/core/info_oss.c b/sound/core/info_oss.c
index f9ce854..f2efca1 100644
--- a/sound/core/info_oss.c
+++ b/sound/core/info_oss.c
@@ -64,6 +64,8 @@
 	return 0;
 }
 
+EXPORT_SYMBOL(snd_oss_info_register);
+
 extern void snd_card_info_read_oss(struct snd_info_buffer *buffer);
 
 static int snd_sndstat_show_strings(struct snd_info_buffer *buf, char *id, int dev)