fixup usage of dma direction by introducing dma_transfer_direction,
this patch moves usb/musb driver to use new enum
Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Acked-by: NFelipe Balbi <balbi@ti.com>
Acked-by: NMian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com>