ALSA: ASoC: move dma_data from snd_soc_dai to snd_soc_pcm_stream

This fixes a memory corruption when ASoC devices are used in
full-duplex mode. Specifically for pxa-ssp code, where this pointer
is dynamically allocated for each direction and destroyed upon each
stream start.

All other platforms are fixed blindly, I couldn't even compile-test
them. Sorry for any breakage I may have caused.

[Note that this is a backported version for 2.6.34.
 Upstream commit is fd23b7dee]

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Reported-by: Sven Neumann <s.neumann@raumfeld.com>
Reported-by: Michael Hirsch <m.hirsch@raumfeld.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/atmel/atmel_ssc_dai.c

@@ -363,12 +363,12 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
 	ssc_p->dma_params[dir] = dma_params;
 
 	/*
-	 * The cpu_dai->dma_data field is only used to communicate the
-	 * appropriate DMA parameters to the pcm driver hw_params()
+	 * The snd_soc_pcm_stream->dma_data field is only used to communicate
+	 * the appropriate DMA parameters to the pcm driver hw_params()
 	 * function.  It should not be used for other purposes
 	 * as it is common to all substreams.
 	 */
-	rtd->dai->cpu_dai->dma_data = dma_params;
+	snd_soc_dai_set_dma_data(rtd->dai->cpu_dai, substream, dma_params);
 
 	channels = params_channels(params);