[ALSA] Keep private TLV entry in vmaster itself

Use a private array for TLV entries of virtual master controls instead
of (supposed) static array.  This cleans up the existing codes.

Also, now vmaster assumes the simple dB-range TLV that is the only type
it can handle.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 7901e76..132d1e3 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -186,9 +186,6 @@
 	struct hda_input_mux private_dimux;
 	struct hda_input_mux private_imux;
 	struct hda_input_mux private_mono_mux;
-
-	/* virtual master */
-	unsigned int vmaster_tlv[4];
 };
 
 static hda_nid_t stac9200_adc_nids[1] = {
@@ -930,10 +927,11 @@
 
 	/* if we have no master control, let's create it */
 	if (!snd_hda_find_mixer_ctl(codec, "Master Playback Volume")) {
+		unsigned int vmaster_tlv[4];
 		snd_hda_set_vmaster_tlv(codec, spec->multiout.dac_nids[0],
-					HDA_OUTPUT, spec->vmaster_tlv);
+					HDA_OUTPUT, vmaster_tlv);
 		err = snd_hda_add_vmaster(codec, "Master Playback Volume",
-					  spec->vmaster_tlv, slave_vols);
+					  vmaster_tlv, slave_vols);
 		if (err < 0)
 			return err;
 	}