ASoC: fsl: lpc3xxx: Make some symbols static

These symbols are not used outside of the files, make them static to fix
sparse warnings:

sound/soc/fsl/lpc3xxx-i2s.c:261:30: warning: symbol 'lpc3xxx_i2s_dai_ops' was not declared. Should it be static?
sound/soc/fsl/lpc3xxx-i2s.c:271:27: warning: symbol 'lpc3xxx_i2s_dai_driver' was not declared. Should it be static?
sound/soc/fsl/lpc3xxx-pcm.c:55:39: warning: symbol 'lpc3xxx_soc_platform_driver' was not declared. Should it be static?
Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://patch.msgid.link/20240802101044.3302251-1-yuehaibing@huawei.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/fsl/lpc3xxx-i2s.c

@@ -257,7 +257,7 @@ static int lpc3xxx_i2s_dai_probe(struct snd_soc_dai *dai)
 	return 0;
 }
 
-const struct snd_soc_dai_ops lpc3xxx_i2s_dai_ops = {
+static const struct snd_soc_dai_ops lpc3xxx_i2s_dai_ops = {
 	.probe	= lpc3xxx_i2s_dai_probe,
 	.startup = lpc3xxx_i2s_startup,
 	.shutdown = lpc3xxx_i2s_shutdown,
@@ -267,7 +267,7 @@ const struct snd_soc_dai_ops lpc3xxx_i2s_dai_ops = {
 	.set_fmt = lpc3xxx_i2s_set_dai_fmt,
 };
 
-struct snd_soc_dai_driver lpc3xxx_i2s_dai_driver = {
+static struct snd_soc_dai_driver lpc3xxx_i2s_dai_driver = {
 	.playback = {
 		.channels_min = 1,
 		.channels_max = 2,

sound/soc/fsl/lpc3xxx-pcm.c

@@ -52,7 +52,7 @@ static const struct snd_dmaengine_pcm_config lpc3xxx_dmaengine_pcm_config = {
 	.prealloc_buffer_size = 128 * 1024,
 };
 
-const struct snd_soc_component_driver lpc3xxx_soc_platform_driver = {
+static const struct snd_soc_component_driver lpc3xxx_soc_platform_driver = {
 	.name = "lpc32xx-pcm",
 };