ASoC: tegra: 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>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/tegra/tegra30_i2s.c

@@ -275,7 +275,7 @@ static int tegra30_i2s_probe(struct snd_soc_dai *dai)
 	return 0;
 }
 
-static struct snd_soc_dai_ops tegra30_i2s_dai_ops = {
+static const struct snd_soc_dai_ops tegra30_i2s_dai_ops = {
 	.set_fmt	= tegra30_i2s_set_fmt,
 	.hw_params	= tegra30_i2s_hw_params,
 	.trigger	= tegra30_i2s_trigger,