[ALSA] Add missing KERN_* suffix to printk

Add missing KERN_* suffix to printk.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/isa/sb/sb_mixer.c b/sound/isa/sb/sb_mixer.c
index ff4b599..5a926a4 100644
--- a/sound/isa/sb/sb_mixer.c
+++ b/sound/isa/sb/sb_mixer.c
@@ -36,7 +36,7 @@
 	outb(data, SBP(chip, MIXER_DATA));
 	udelay(10);
 #ifdef IO_DEBUG
-	snd_printk("mixer_write 0x%x 0x%x\n", reg, data);
+	snd_printk(KERN_DEBUG "mixer_write 0x%x 0x%x\n", reg, data);
 #endif
 }
 
@@ -49,7 +49,7 @@
 	result = inb(SBP(chip, MIXER_DATA));
 	udelay(10);
 #ifdef IO_DEBUG
-	snd_printk("mixer_read 0x%x 0x%x\n", reg, result);
+	snd_printk(KERN_DEBUG "mixer_read 0x%x 0x%x\n", reg, result);
 #endif
 	return result;
 }