media: TDA1997x: fix tda1997x_remove()

TDA1997x driver tried to hold two values in a single variable:
device's "client data" pointer was first set to "sd" in
v4l2_i2c_subdev_init(), then it was overwritten explicitly
using dev_set_drvdata() with "state". This caused
tda1997x_remove() to fail badly.
Signed-off-by: Krzysztof Hałasa <khalasa@piap.pl>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/i2c/tda1997x.c

@@ -2450,7 +2450,8 @@ static const struct media_entity_operations tda1997x_media_ops = {
 static int tda1997x_pcm_startup(struct snd_pcm_substream *substream,
 				struct snd_soc_dai *dai)
 {
-	struct tda1997x_state *state = snd_soc_dai_get_drvdata(dai);
+	struct v4l2_subdev *sd = snd_soc_dai_get_drvdata(dai);
+	struct tda1997x_state *state = to_state(sd);
 	struct snd_soc_component *component = dai->component;
 	struct snd_pcm_runtime *rtd = substream->runtime;
 	int rate, err;
@@ -2759,7 +2760,6 @@ static int tda1997x_probe(struct i2c_client *client,
 			dev_err(&client->dev, "register audio codec failed\n");
 			goto err_free_media;
 		}
-		dev_set_drvdata(&state->client->dev, state);
 		v4l_info(state->client, "registered audio codec\n");
 	}