Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/sound/soc/codecs/mt6351.c b/sound/soc/codecs/mt6351.c
index f73dcd7..5c0536e 100644
--- a/sound/soc/codecs/mt6351.c
+++ b/sound/soc/codecs/mt6351.c
@@ -1066,11 +1066,6 @@
 	return 0;
 }
 
-/* DAPM Kcontrols */
-static const struct snd_kcontrol_new mt_lineout_control =
-	SOC_DAPM_SINGLE("Switch", MT6351_AUDDEC_ANA_CON3,
-			RG_AUDLOLPWRUP_VAUDP32_BIT, 1, 0);
-
 /* DAPM Widgets */
 static const struct snd_soc_dapm_widget mt6351_dapm_widgets[] = {
 	/* Digital Clock */
@@ -1415,8 +1410,6 @@
 
 static int mt6351_codec_init_reg(struct snd_soc_component *cmpnt)
 {
-	int ret = 0;
-
 	/* Disable CLKSQ 26MHz */
 	regmap_update_bits(cmpnt->regmap, MT6351_TOP_CLKSQ, 0x0001, 0x0);
 	/* disable AUDGLB */
@@ -1434,7 +1427,7 @@
 	/* Reverse the PMIC clock*/
 	regmap_update_bits(cmpnt->regmap, MT6351_AFE_PMIC_NEWIF_CFG2,
 			   0x8000, 0x8000);
-	return ret;
+	return 0;
 }
 
 static int mt6351_codec_probe(struct snd_soc_component *cmpnt)