linux-imx

MLK-15330-3 dma: fsl-edma-v3: add dual fifo support

There is Audio dual fifo cause that fill fifo one by one and
loop back after every minor loop:
  -- fill the first 32bit width fifo
  -- fill the next 32bit width fifo
  -- +MLOFF signed offset after the above two FIFOs filled
  -- loop back to the first step to handle the next minor loop.

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
(cherry picked from commit 5aa5e9663bb3a834444b75ea086bef8c37ecb636)