ASoC: imx: add missing module informations

- add some modules alias
- add module license to avoid tainted kernel when loading the imx-pcm-audio
  driver

Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Index: linux-2.6-submit/sound/soc/imx/imx-pcm-dma-mx2.c
===================================================================
--- linux-2.6-submit.orig/sound/soc/imx/imx-pcm-dma-mx2.c	2011-06-22 09:20:08.000000000 +0200
+++ linux-2.6-submit/sound/soc/imx/imx-pcm-dma-mx2.c	2011-06-22 09:20:35.000000000 +0200
@@ -337,3 +337,5 @@ static void __exit snd_imx_pcm_exit(void
 	platform_driver_unregister(&imx_pcm_driver);
 }
 module_exit(snd_imx_pcm_exit);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:imx-pcm-audio");
Index: linux-2.6-submit/sound/soc/imx/imx-ssi.c
===================================================================
--- linux-2.6-submit.orig/sound/soc/imx/imx-ssi.c	2011-06-22 09:20:08.000000000 +0200
+++ linux-2.6-submit/sound/soc/imx/imx-ssi.c	2011-06-22 09:49:02.000000000 +0200
@@ -774,4 +774,4 @@ module_exit(imx_ssi_exit);
 MODULE_AUTHOR("Sascha Hauer, <s.hauer@pengutronix.de>");
 MODULE_DESCRIPTION("i.MX I2S/ac97 SoC Interface");
 MODULE_LICENSE("GPL");
-
+MODULE_ALIAS("platform:imx-ssi");