ALSA: Add missing KERN_* prefix to printk in sound/drivers

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/drivers/virmidi.c b/sound/drivers/virmidi.c
index f79e361..1022e36 100644
--- a/sound/drivers/virmidi.c
+++ b/sound/drivers/virmidi.c
@@ -98,7 +98,9 @@
 	vmidi->card = card;
 
 	if (midi_devs[dev] > MAX_MIDI_DEVICES) {
-		snd_printk("too much midi devices for virmidi %d: force to use %d\n", dev, MAX_MIDI_DEVICES);
+		snd_printk(KERN_WARNING
+			   "too much midi devices for virmidi %d: "
+			   "force to use %d\n", dev, MAX_MIDI_DEVICES);
 		midi_devs[dev] = MAX_MIDI_DEVICES;
 	}
 	for (idx = 0; idx < midi_devs[dev]; idx++) {