ASoC: mediatek: btcvsd fix rx stream assign

fix tx/rx stream assign wrong direction
Signed-off-by: KaiChieh Chuang <kaichieh.chuang@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/mediatek/common/mtk-btcvsd.c

@@ -250,7 +250,7 @@ static int mtk_btcvsd_snd_rx_init(struct mtk_btcvsd_snd *bt)
 	bt->rx->buf_size = BTCVSD_RX_BUF_SIZE;
 	bt->rx->timeout = 0;
 	bt->rx->rw_cnt = 0;
-	bt->tx->stream = SNDRV_PCM_STREAM_CAPTURE;
+	bt->rx->stream = SNDRV_PCM_STREAM_CAPTURE;
 	return 0;
 }