mmc-host: move to dma_transfer_direction

fixup usage of dma direction by introducing dma_transfer_direction,
this patch moves mmc drivers to use new enum

Cc: Nicolas Ferre <[email protected]>
Cc: Chris Ball <[email protected]>
Cc: Guennadi Liakhovetski <[email protected]>
Acked-by: Nicolas Ferre <[email protected]>
Acked-by: Guennadi Liakhovetski <[email protected]>
Signed-off-by: Vinod Koul <[email protected]>
6 files changed