UPSTREAM: dma: import linux/dma-direction.h to consolidate enum dma_data_direction

Import include/linux/dma-direction.h from Linux 4.13-rc7 and delete
duplicated definitions of enum dma_data_directi

UPSTREAM: dma: import linux/dma-direction.h to consolidate enum dma_data_direction

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)

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x86: Add dma-mapping.h to architectural code

Some cross-platform drivers rely on this header present.
Make it so for x86.

It's just a copy'n'paste of arch/arm/include/asm/dma-mapping.h.

Suggested-

x86: Add dma-mapping.h to architectural code

Some cross-platform drivers rely on this header present.
Make it so for x86.

It's just a copy'n'paste of arch/arm/include/asm/dma-mapping.h.

Suggested-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

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