dmaengine: cirrus: Convert to DT for Cirrus EP93xx

Convert Cirrus EP93xx DMA to device tree usage:

- add OF ID match table with data
- add of_probe for device tree
- add xlate for m2m/m2p
- drop subsys_initcall code
- drop platform probe
- drop platform structs usage

>From now on it only supports device tree probing.

Co-developed-by: Alexander Sverdlin <[email protected]>
Signed-off-by: Alexander Sverdlin <[email protected]>
Acked-by: Vinod Koul <[email protected]>
Signed-off-by: Nikita Shubin <[email protected]>
Tested-by: Alexander Sverdlin <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>

Author: maquefel