ASoC: bcm: bcm63xx: Publish the OF module aliases

The BCM63xx I2S platform driver matches brcm,bcm63xx-i2s using
snd_soc_bcm_audio_match. With SND_BCM63XX_I2S_WHISTLER=m, the platform
bus emits an OF modalias but snd-soc-63xx does not publish that table.

Export the existing OF IDs for module autoloading. The PCM companion
and the probe path remain unchanged.

Fixes: 88eb404ccc ("ASoC: brcm: Add DSL/PON SoC audio driver")
Signed-off-by: hpp.iscas <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Mark Brown <[email protected]>

sound/soc/bcm/bcm63xx-i2s-whistler.c

@@ -285,6 +285,7 @@ static const struct of_device_id snd_soc_bcm_audio_match[] = {
 	{.compatible = "brcm,bcm63xx-i2s"},
 	{ }
 };
+MODULE_DEVICE_TABLE(of, snd_soc_bcm_audio_match);
 #endif
 
 static struct platform_driver bcm63xx_i2s_driver = {