[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/emu8000_synth.c b/sound/isa/sb/emu8000_synth.c
index 1f63aa5..f68e2174 100644
--- a/sound/isa/sb/emu8000_synth.c
+++ b/sound/isa/sb/emu8000_synth.c
@@ -56,7 +56,7 @@
 	emu->num_ports = hw->seq_ports;
 
 	if (hw->memhdr) {
-		snd_printk("memhdr is already initialized!?\n");
+		snd_printk(KERN_ERR "memhdr is already initialized!?\n");
 		snd_util_memhdr_free(hw->memhdr);
 	}
 	hw->memhdr = snd_util_memhdr_new(hw->mem_size);