ASoC: wcd9310: Use calibrated threshold

Use calibrated threshold rather than hardcoded one to catch MBHC fake
button press interrupt.

Change-Id: I9b4acae81bf7e21f5282a2338269f91d78b14cf3
Signed-off-by: Joonwoo Park <joonwoop@codeaurora.org>
diff --git a/sound/soc/codecs/wcd9310.c b/sound/soc/codecs/wcd9310.c
index e116ca9..3d41abf 100644
--- a/sound/soc/codecs/wcd9310.c
+++ b/sound/soc/codecs/wcd9310.c
@@ -3900,7 +3900,8 @@
 {
 	struct tabla_priv *priv = data;
 	struct snd_soc_codec *codec = priv->codec;
-	int ret, mb_v;
+	int ret;
+	short mb_v;
 
 	pr_debug("%s: enter\n", __func__);
 	tabla_disable_irq(codec->control_data, TABLA_IRQ_MBHC_RELEASE);
@@ -3924,7 +3925,8 @@
 				 __func__, mb_v,
 				 tabla_codec_sta_dce_v(codec, 0, mb_v));
 
-			if (mb_v < -2000 || mb_v > -670)
+			if (mb_v < (short)priv->mbhc_data.v_b1_hu ||
+			    mb_v > (short)priv->mbhc_data.v_ins_hu)
 				pr_debug("%s: Fake buttton press interrupt\n",
 					 __func__);
 			else if (priv->button_jack) {