ASoC: ti: omap-abe-twl6040: remove useless assignment

cppcheck warning:

sound/soc/ti/omap-abe-twl6040.c:173:10: style: Variable 'ret' is
assigned a value that is never used. [unreadVariable]
 int ret = 0;
         ^
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Peter Ujfalusi <peter.ujfalusi@gmail.com>
Link: https://lore.kernel.org/r/20210326215927.936377-15-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/ti/omap-abe-twl6040.c

@@ -170,7 +170,7 @@ static int omap_abe_twl6040_init(struct snd_soc_pcm_runtime *rtd)
 	struct snd_soc_card *card = rtd->card;
 	struct abe_twl6040 *priv = snd_soc_card_get_drvdata(card);
 	int hs_trim;
-	int ret = 0;
+	int ret;
 
 	/*
 	 * Configure McPDM offset cancellation based on the HSOTRIM value from