ASoC: da7210: bugfix for head phone volume control

This patch takes care of reserved bits of headphone volume
register by using correct volume range.
Signed-off-by: Ashish Chavan <ashish.chavan@kpitcummins.com>
Signed-off-by: David Dajun Chen <dchen@diasemi.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/da7210.c

@@ -149,12 +149,14 @@
  * mute		: 0x10
  * reserved	: 0x00 - 0x0F
  *
- * ** FIXME **
- *
  * Reserved area are considered as "mute".
- * -> min = -79.5 dB
  */
-static const DECLARE_TLV_DB_SCALE(hp_out_tlv, -7950, 150, 1);
+static const unsigned int hp_out_tlv[] = {
+	TLV_DB_RANGE_HEAD(2),
+	0x0, 0x10, TLV_DB_SCALE_ITEM(TLV_DB_GAIN_MUTE, 0, 1),
+	/* -54 dB to +15 dB */
+	0x11, 0x3f, TLV_DB_SCALE_ITEM(-5400, 150, 0),
+};
 
 static const struct snd_kcontrol_new da7210_snd_controls[] = {