dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h>

Move more nitty gritty DMA implementation details into the common
internal header.

Signed-off-by: Christoph Hellwig <hch@lst.de>

kernel/dma/ops_helpers.c

@@ -4,7 +4,6 @@
  * the allocated memory contains normal pages in the direct kernel mapping.
  */
 #include <linux/dma-map-ops.h>
-#include <linux/dma-noncoherent.h>
 
 /*
  * Create scatter-list for the already allocated DMA buffer.

kernel/dma/pool.c

@@ -7,7 +7,6 @@
 #include <linux/debugfs.h>
 #include <linux/dma-map-ops.h>
 #include <linux/dma-direct.h>
-#include <linux/dma-noncoherent.h>
 #include <linux/init.h>
 #include <linux/genalloc.h>
 #include <linux/set_memory.h>

kernel/dma/swiotlb.c

@@ -22,7 +22,7 @@
 
 #include <linux/cache.h>
 #include <linux/dma-direct.h>
-#include <linux/dma-noncoherent.h>
+#include <linux/dma-map-ops.h>
 #include <linux/mm.h>
 #include <linux/export.h>
 #include <linux/spinlock.h>