ASoC: imx: Add MODULE_LICENSE to DMA drivers

Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/fsl/imx-pcm-dma.c

@@ -14,6 +14,7 @@
 #include <linux/platform_device.h>
 #include <linux/dmaengine.h>
 #include <linux/types.h>
+#include <linux/module.h>
 
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -73,3 +74,5 @@ void imx_pcm_dma_exit(struct platform_device *pdev)
 	snd_dmaengine_pcm_unregister(&pdev->dev);
 }
 EXPORT_SYMBOL_GPL(imx_pcm_dma_exit);
+
+MODULE_LICENSE("GPL");

sound/soc/fsl/imx-pcm-fiq.c

@@ -408,3 +408,5 @@ void imx_pcm_fiq_exit(struct platform_device *pdev)
 	snd_soc_unregister_platform(&pdev->dev);
 }
 EXPORT_SYMBOL_GPL(imx_pcm_fiq_exit);
+
+MODULE_LICENSE("GPL");