ALSA: hda: use position offset macro of TLV data

A series of SNDRV_CTL_TLVO_XXX macro was introduced for position offset
of TLV data. This commit applies a code optimization.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_generic.c b/sound/pci/hda/hda_generic.c
index 51030f0..db773e2 100644
--- a/sound/pci/hda/hda_generic.c
+++ b/sound/pci/hda/hda_generic.c
@@ -2065,7 +2065,7 @@ static int parse_output_paths(struct hda_codec *codec)
 			snd_hda_set_vmaster_tlv(codec, spec->vmaster_nid,
 						HDA_OUTPUT, spec->vmaster_tlv);
 			if (spec->dac_min_mute)
-				spec->vmaster_tlv[3] |= TLV_DB_SCALE_MUTE;
+				spec->vmaster_tlv[SNDRV_CTL_TLVO_DB_SCALE_MUTE_AND_STEP] |= TLV_DB_SCALE_MUTE;
 		}
 	}