ASoC: amd: renoir: acp3x-pdm-dma: 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: Ye Bin <yebin10@huawei.com>
Link: https://lore.kernel.org/r/20210408062658.803724-1-yebin10@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/amd/renoir/acp3x-pdm-dma.c

@@ -356,7 +356,7 @@ static int acp_pdm_dai_trigger(struct snd_pcm_substream *substream,
 	return ret;
 }
 
-static struct snd_soc_dai_ops acp_pdm_dai_ops = {
+static const struct snd_soc_dai_ops acp_pdm_dai_ops = {
 	.trigger   = acp_pdm_dai_trigger,
 };