ALSA: powermac - Add missing KERN_* prefix to printk

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/ppc/daca.c b/sound/ppc/daca.c
index 8a5b290..f8d478c 100644
--- a/sound/ppc/daca.c
+++ b/sound/ppc/daca.c
@@ -82,7 +82,7 @@
 	data[1] |= mix->deemphasis ? 0x40 : 0;
 	if (i2c_smbus_write_block_data(mix->i2c.client, DACA_REG_AVOL,
 				       2, data) < 0) {
-		snd_printk("failed to set volume \n");
+		snd_printk(KERN_ERR "failed to set volume \n");
 		return -EINVAL;
 	}
 	return 0;