staging: comedi: drivers.c: replace #include <linux/dma-mapping.h>

Comedi's "drivers.c" doesn't use anything from `<linux/dma-mapping.h>`,
but it does use `DMA_NONE` from `<linux/dma-direction.h>`, so replace
the appropriate `#include` directive.

Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ian Abbott 2015-09-17 17:19:16 +01:00 • committed by Greg Kroah-Hartman
commit d35d893965