ASoC: max98363: Make soc_codec_dev_max98363 static

smatch reports
sound/soc/codecs/max98363.c:392:39: warning: symbol
  'soc_codec_dev_max98363' was not declared. Should it be static?

This variable is only used in one file so should be static.
Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20230406152300.1954292-1-trix@redhat.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/max98363.c

@@ -389,7 +389,7 @@ static const struct snd_soc_dapm_route max98363_audio_map[] = {
 	{"BE_OUT", NULL, "AIFIN"},
 };
 
-const struct snd_soc_component_driver soc_codec_dev_max98363 = {
+static const struct snd_soc_component_driver soc_codec_dev_max98363 = {
 	.controls		= max98363_snd_controls,
 	.num_controls		= ARRAY_SIZE(max98363_snd_controls),
 	.dapm_widgets		= max98363_dapm_widgets,