ASoC: codecs: rk3308: fix building without CONFIG_OF

The newly added codec has an extraneous of_match_ptr() annotation for
the ID table:

sound/soc/codecs/rk3308_codec.c:956:34: error: 'rk3308_codec_of_match' defined but not used [-Werror=unused-const-variable=]
  956 | static const struct of_device_id rk3308_codec_of_match[] = {

Remove it to avoid introducing a warning when -Wunused-const-variable
gets enabled by default:

Fixes: 4ed0915f ("ASoC: codecs: Add RK3308 internal audio codec driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://msgid.link/r/20240404095755.650364-1-arnd@kernel.orgSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/rk3308_codec.c

@@ -962,7 +962,7 @@ MODULE_DEVICE_TABLE(of, rk3308_codec_of_match);
 static struct platform_driver rk3308_codec_driver = {
 	.driver = {
 		.name = "rk3308-acodec",
-		.of_match_table = of_match_ptr(rk3308_codec_of_match),
+		.of_match_table = rk3308_codec_of_match,
 	},
 	.probe = rk3308_codec_platform_probe,
 };