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

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/drivers/opl3/opl3_lib.c b/sound/drivers/opl3/opl3_lib.c
index 7805823..6e31e46 100644
--- a/sound/drivers/opl3/opl3_lib.c
+++ b/sound/drivers/opl3/opl3_lib.c
@@ -302,7 +302,7 @@
 	opl3 = hw->private_data;
 	status = inb(opl3->l_port);
 #if 0
-	snd_printk("AdLib IRQ status = 0x%x\n", status);
+	snd_printk(KERN_DEBUG "AdLib IRQ status = 0x%x\n", status);
 #endif
 	if (!(status & 0x80))
 		return;