ASoC: kirkwood: add alias to pcm module

Allow snd-soc-kirkwood autoloading by adding an alias.
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/kirkwood/kirkwood-dma.c

@@ -400,4 +400,4 @@ module_exit(kirkwood_pcm_exit);
 MODULE_AUTHOR("Arnaud Patard <apatard@mandriva.com>");
 MODULE_DESCRIPTION("Marvell Kirkwood Audio DMA module");
 MODULE_LICENSE("GPL");
-
+MODULE_ALIAS("platform:kirkwood-pcm-audio");