TODO (357B)
1TODO for slave dma 2 31. Move remaining drivers to use new slave interface 42. Remove old slave pointer machansim 53. Make issue_pending to start the transaction in below drivers 6 - mpc512x_dma 7 - imx-dma 8 - imx-sdma 9 - mxs-dma.c 10 - intel_mid_dma 114. Check other subsystems for dma drivers and merge/move to dmaengine 125. Remove dma_slave_config's dma direction.