ALSA: hda: STAC_VREF_EVENT value change

Changed value for STAC_VREF_EVENT from 0x40 to 0x00 because the
unsol response value is only 6-bits width and the former value
was 1<<6 which is an overrun.
Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/hda/patch_sigmatel.c

@@ -36,9 +36,11 @@
 #include "hda_beep.h"
 
 #define NUM_CONTROL_ALLOC	32
+
+#define STAC_VREF_EVENT		0x00
+#define STAC_INSERT_EVENT	0x10
 #define STAC_PWR_EVENT		0x20
 #define STAC_HP_EVENT		0x30
-#define STAC_VREF_EVENT		0x40
 
 enum {
 	STAC_REF,