ARM: reduce visibility of dmac_* functions

The dmac_* functions are private to the ARM DMA API implementation, and
should not be used by drivers.  In order to discourage their use, remove
their prototypes and macros from asm/*.h.

We have to leave dmac_flush_range() behind as Exynos and MSM IOMMU code
use these; once these sites are fixed, this can be moved also.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 1ced8a0..5edf17c 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -39,6 +39,7 @@
 #include <asm/system_info.h>
 #include <asm/dma-contiguous.h>
 
+#include "dma.h"
 #include "mm.h"
 
 /*