As the ssi is not the only cpu dai, there are esai, spdif, sai.
and imx_pcm_dma can be used by all of them. Especially ESAI need
a larger DMA buffer size. So Add dedicated DMA buffer for each cpu
dai.
Signed-off-by: NShengjiu Wang <shengjiu.wang@freescale.com>
Acked-by: NNicolin Chen <nicoleotsuka@gmail.com>
Acked-by: NTimur Tabi <timur@tabi.org>
Signed-off-by: NMark Brown <broonie@kernel.org>