ASoC: samsung: Use devm_snd_soc_register_platform

Replaced snd_soc_register_platform with devm_snd_soc_register_platform
in samsung_asoc_dma_platform_register(). This makes the function
samsung_asoc_dma_platform_unregister() redundant. This is removed and
all its users are updated.

Signed-off-by: Tushar Behera <tushar.behera@linaro.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/samsung/dma.c b/sound/soc/samsung/dma.c
index dc09b71..d9dc7bc 100644
--- a/sound/soc/samsung/dma.c
+++ b/sound/soc/samsung/dma.c
@@ -445,16 +445,10 @@
 
 int samsung_asoc_dma_platform_register(struct device *dev)
 {
-	return snd_soc_register_platform(dev, &samsung_asoc_platform);
+	return devm_snd_soc_register_platform(dev, &samsung_asoc_platform);
 }
 EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_register);
 
-void samsung_asoc_dma_platform_unregister(struct device *dev)
-{
-	snd_soc_unregister_platform(dev);
-}
-EXPORT_SYMBOL_GPL(samsung_asoc_dma_platform_unregister);
-
 MODULE_AUTHOR("Ben Dooks, <ben@simtec.co.uk>");
 MODULE_DESCRIPTION("Samsung ASoC DMA Driver");
 MODULE_LICENSE("GPL");