Rename the functions in the mpc5200 DMA file from i2s based names to dma
ones to reflect the file they are in.
Signed-off-by: NJon Smirl <jonsmirl@gmail.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

Basic split of mpc5200 DMA code out from i2s into a standalone file.
Signed-off-by: NJon Smirl <jonsmirl@gmail.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>