ASoC: blackfin: constify snd_soc_dai_ops structures

These snd_soc_dai_ops structures are only stored in the ops field of
a snd_soc_dai_driver structure, which is const.  Thus, the
snd_soc_dai_ops structures can be const too.

Done with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/blackfin/bf6xx-i2s.c

@@ -164,7 +164,7 @@ static int bfin_i2s_resume(struct snd_soc_dai *dai)
 #define BFIN_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
 		SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 
-static struct snd_soc_dai_ops bfin_i2s_dai_ops = {
+static const struct snd_soc_dai_ops bfin_i2s_dai_ops = {
 	.hw_params	= bfin_i2s_hw_params,
 	.set_fmt	= bfin_i2s_set_dai_fmt,
 };