ASoC: rk817: 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.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20210602113643.3037374-1-weiyongjun1@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rk817_codec.c

@@ -383,7 +383,7 @@ static int rk817_digital_mute(struct snd_soc_dai *dai, int mute, int stream)
 			SNDRV_PCM_FMTBIT_S24_LE |\
 			SNDRV_PCM_FMTBIT_S32_LE)
 
-static struct snd_soc_dai_ops rk817_dai_ops = {
+static const struct snd_soc_dai_ops rk817_dai_ops = {
 	.hw_params	= rk817_hw_params,
 	.set_fmt	= rk817_set_dai_fmt,
 	.set_sysclk	= rk817_set_dai_sysclk,