ASoC: omap: rx51: Add module alias

Add module alias to support driver autoloading.
Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/omap/rx51.c

@@ -421,3 +421,4 @@ module_exit(rx51_soc_exit);
 MODULE_AUTHOR("Nokia Corporation");
 MODULE_DESCRIPTION("ALSA SoC Nokia RX-51");
 MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:rx51-audio");