ASoC: ak4458: Add MODULE_DEVICE_TABLE

Add missed MODULE_DEVICE_TABLE for the driver can be loaded
automatically at boot.

Fixes: 08660086 ("ASoC: ak4458: Add support for AK4458 DAC driver")
Cc: <stable@vger.kernel.org>
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1614149872-25510-1-git-send-email-shengjiu.wang@nxp.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/ak4458.c

@@ -812,6 +812,7 @@ static const struct of_device_id ak4458_of_match[] = {
 	{ .compatible = "asahi-kasei,ak4497", .data = &ak4497_drvdata},
 	{ },
 };
+MODULE_DEVICE_TABLE(of, ak4458_of_match);
 
 static struct i2c_driver ak4458_i2c_driver = {
 	.driver = {