ALSA: emux - Add missing KERN_* prefix to printk

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/synth/emux/emux_oss.c b/sound/synth/emux/emux_oss.c
index 5c47b6c..87e4220 100644
--- a/sound/synth/emux/emux_oss.c
+++ b/sound/synth/emux/emux_oss.c
@@ -132,7 +132,7 @@
 	p = snd_emux_create_port(emu, tmpname, 32,
 				 1, &callback);
 	if (p == NULL) {
-		snd_printk("can't create port\n");
+		snd_printk(KERN_ERR "can't create port\n");
 		snd_emux_dec_count(emu);
 		mutex_unlock(&emu->register_mutex);
 		return -ENOMEM;