ALSA: Fix missing KERN_* prefix to printk in sound/pci

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/au88x0/au88x0_a3d.c b/sound/pci/au88x0/au88x0_a3d.c
index 649849e..f4aa8ff 100644
--- a/sound/pci/au88x0/au88x0_a3d.c
+++ b/sound/pci/au88x0/au88x0_a3d.c
@@ -462,9 +462,10 @@
 /* Reset Single A3D source. */
 static void a3dsrc_ZeroState(a3dsrc_t * a)
 {
-
-	//printk("vortex: ZeroState slice: %d, source %d\n", a->slice, a->source);
-
+	/*
+	printk(KERN_DEBUG "vortex: ZeroState slice: %d, source %d\n",
+	       a->slice, a->source);
+	*/
 	a3dsrc_SetAtmosState(a, 0, 0, 0, 0);
 	a3dsrc_SetHrtfState(a, A3dHrirZeros, A3dHrirZeros);
 	a3dsrc_SetItdDline(a, A3dItdDlineZeros);