Import include/linux/dma-direction.h from Linux 4.13-rc7 and delete
duplicated definitions of enum dma_data_direction.
Change-Id: I9c6569e4ab91ac82fb1c99a38003a1ac48061813
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
(cherry picked from commit b27af39935855c88ef2203dcfc1ff54e013237c4)
Masahiro Yamada