ASoC: max9867: constify snd_soc_dai_ops structure

This structure is only stored in the ops field of a snd_soc_dai_driver
structure. That field is declared const, so snd_soc_dai_ops structures
that have this property can be declared as const also.
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/max9867.c

@@ -350,7 +350,7 @@ static int max9867_dai_set_fmt(struct snd_soc_dai *codec_dai,
 	return 0;
 }
 
-static struct snd_soc_dai_ops max9867_dai_ops = {
+static const struct snd_soc_dai_ops max9867_dai_ops = {
 	.set_fmt = max9867_dai_set_fmt,
 	.set_sysclk	= max9867_set_dai_sysclk,
 	.prepare	= max9867_prepare,