ASoC: mxs-saif: drop unneeded snd_soc_dai_set_drvdata

snd_soc_dai_set_drvdata is not needed when the set data comes from
snd_soc_dai_get_drvdata or dev_get_drvdata.  The problem was fixed
usingthe following semantic patch: (http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,y,e;
@@
	x = dev_get_drvdata(y->dev)
	... when != x = e
-	snd_soc_dai_set_drvdata(y,x);

@@
expression x,y,e;
@@
	x = snd_soc_dai_get_drvdata(y)
	... when != x = e
-	snd_soc_dai_set_drvdata(y,x);
// </smpl>

In this case, the whole probe function then does nothing, so drop it.
Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>
Link: https://lore.kernel.org/r/20210213101907.1318496-3-Julia.Lawall@inria.frSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/mxs/mxs-saif.c

@@ -642,18 +642,8 @@ static const struct snd_soc_dai_ops mxs_saif_dai_ops = {
 	.set_fmt = mxs_saif_set_dai_fmt,
 };
 
-static int mxs_saif_dai_probe(struct snd_soc_dai *dai)
-{
-	struct mxs_saif *saif = dev_get_drvdata(dai->dev);
-
-	snd_soc_dai_set_drvdata(dai, saif);
-
-	return 0;
-}
-
 static struct snd_soc_dai_driver mxs_saif_dai = {
 	.name = "mxs-saif",
-	.probe = mxs_saif_dai_probe,
 	.playback = {
 		.channels_min = 2,
 		.channels_max = 2,