ASoC: sirf-audio-codec: Staticise local symbols

Also make sirf_audio_codec_dai_ops const.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/sirf-audio-codec.c

@@ -370,11 +370,11 @@ static int sirf_audio_codec_trigger(struct snd_pcm_substream *substream,
 	return 0;
 }
 
-struct snd_soc_dai_ops sirf_audio_codec_dai_ops = {
+static const struct snd_soc_dai_ops sirf_audio_codec_dai_ops = {
 	.trigger = sirf_audio_codec_trigger,
 };
 
-struct snd_soc_dai_driver sirf_audio_codec_dai = {
+static struct snd_soc_dai_driver sirf_audio_codec_dai = {
 	.name = "sirf-audio-codec",
 	.playback = {
 		.stream_name = "Playback",