ASoC: ux500: Use generic dmaengine PCM

Use the generic dmaengine PCM driver instead of a custom implemention.  There is
a minor functional change, the ux500 PCM driver did not preallocate the audio
buffer, while the generic dmaengine PCM driver will do this.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h
index e705286..b1d1150 100644
--- a/include/sound/dmaengine_pcm.h
+++ b/include/sound/dmaengine_pcm.h
@@ -87,7 +87,7 @@
  */
 #define SND_DMAENGINE_PCM_FLAG_NO_DT BIT(1)
 /*
- * The platforms dmaengine driver does not support reporting the ammount of
+ * The platforms dmaengine driver does not support reporting the amount of
  * bytes that are still left to transfer.
  */
 #define SND_DMAENGINE_PCM_FLAG_NO_RESIDUE BIT(2)