ASoC: codecs: wcd938x: constify static struct snd_soc_dai_ops

The snd_soc_dai_ops structures is only stored in the ops field of a
snd_soc_dai_driver structure, so make the snd_soc_dai_ops structure
const to allow the compiler to put it in read-only memory.
Signed-off-by: Pu Lehui <pulehui@huawei.com>
Link: https://lore.kernel.org/r/20210615113324.238837-1-pulehui@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/wcd938x.c

@@ -3519,7 +3519,7 @@ static int wcd938x_codec_set_sdw_stream(struct snd_soc_dai *dai,
 
 }
 
-static struct snd_soc_dai_ops wcd938x_sdw_dai_ops = {
+static const struct snd_soc_dai_ops wcd938x_sdw_dai_ops = {
 	.hw_params = wcd938x_codec_hw_params,
 	.hw_free = wcd938x_codec_free,
 	.set_sdw_stream = wcd938x_codec_set_sdw_stream,