MLK-16224-4: ASoC: fsl_sai: support multi fifo and DSD

MLK-16224-4: ASoC: fsl_sai: support multi fifo and DSD

The codec always mux the LRCLK pin to DSD data line, so when
we want to support DSD, the pinmux is different. For two channel
DSD, the DSDL is mapped to TX0, but the DSDR is mapped to TX4,
there is address offset for the fifo address of TX0 and TX4, TX4's
fifo is not adjacent to TX0's.

Usually, if mapping is TX0 and TX1, that will be easy for SAI
and SDMA to handle, that SAI can use the FIFO combine mode, SDMA
can use the normal script.

so for DSD:
1. The SDMA should use the multi-fifo script, and SAI can't
use the FIFO combine mode.
2. driver should to check the dts configuration(fsl,dataline) for
which dataline is used corrently
3. maxburst is the multiply of datalines
4. each channel of DSD occupy one data lane
5. according to data lane, set TRCE bits

Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Viorel Suman <viorel.suman@nxp.com>