ASoC: mt6359: remove useless assignment

cppcheck warning:

sound/soc/codecs/mt6359.c:242:19: style: Variable 'stage' is assigned a value that is never used. [unreadVariable]
 int i = 0, stage = 0;
                  ^
sound/soc/codecs/mt6359.c:260:19: style: Variable 'stage' is assigned a value that is never used. [unreadVariable]
 int i = 0, stage = 0;
                  ^
sound/soc/codecs/mt6359.c:274:8: style: Variable 'i' is assigned a value that is never used. [unreadVariable]
 int i = 0, stage = 0;
       ^
sound/soc/codecs/mt6359.c:274:19: style: Variable 'stage' is assigned a value that is never used. [unreadVariable]
 int i = 0, stage = 0;
                  ^
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20210312182246.5153-15-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/mt6359.c

@@ -239,7 +239,7 @@ static void zcd_disable(struct mt6359_priv *priv)
 
 static void hp_main_output_ramp(struct mt6359_priv *priv, bool up)
 {
-	int i = 0, stage = 0;
+	int i, stage;
 	int target = 7;
 
 	/* Enable/Reduce HPL/R main output stage step by step */
@@ -257,7 +257,7 @@ static void hp_main_output_ramp(struct mt6359_priv *priv, bool up)
 
 static void hp_aux_feedback_loop_gain_ramp(struct mt6359_priv *priv, bool up)
 {
-	int i = 0, stage = 0;
+	int i, stage;
 	int target = 0xf;
 
 	/* Enable/Reduce HP aux feedback loop gain step by step */