ASoC: zx_aud96p22: make array aud96p22_dt_ids static

The array aud96p22_dt_ids is local to the source and does not need to be
in global scope, so make it static.

Cleans up sparse warning:
symbol 'aud96p22_dt_ids' was not declared. Should it be static?
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/zx_aud96p22.c

@@ -382,7 +382,7 @@ static int aud96p22_i2c_remove(struct i2c_client *i2c)
 	return 0;
 }
 
-const struct of_device_id aud96p22_dt_ids[] = {
+static const struct of_device_id aud96p22_dt_ids[] = {
 	{ .compatible = "zte,zx-aud96p22", },
 	{ }
 };