ASoC: mediatek: mt8186: remove redundant assignments to variable tdm_con

There are two occurrences where variable tdm_con is being initialized
to zero and the next statement re-assigns tdm_con to a new value. The
initializations are redundant and can be removed.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20231023151704.670240-1-colin.i.king@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: ColinIanKing

sound/soc/mediatek/mt8186/mt8186-dai-tdm.c

@@ -416,12 +416,10 @@ static int mtk_dai_tdm_hw_params(struct snd_pcm_substream *substream,
 	regmap_update_bits(afe->regmap, ETDM_IN1_CON1, ETDM_IN_CON1_CTRL_MASK, tdm_con);
 
 	/* ETDM_IN1_CON3 */
-	tdm_con = 0;
 	tdm_con = ETDM_IN_CON3_FS(tran_rate);
 	regmap_update_bits(afe->regmap, ETDM_IN1_CON3, ETDM_IN_CON3_CTRL_MASK, tdm_con);
 
 	/* ETDM_IN1_CON4 */
-	tdm_con = 0;
 	tdm_con = ETDM_IN_CON4_FS(tran_relatch_rate);
 	if (slave_mode) {
 		if (lrck_inv)