common: dma-mapping: remove old alloc_coherent and free_coherent methods

Remove old, unused alloc_coherent and free_coherent methods from
dma_map_ops structure.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

include/linux/dma-mapping.h

@@ -9,10 +9,6 @@
 #include <linux/scatterlist.h>
 
 struct dma_map_ops {
-	void* (*alloc_coherent)(struct device *dev, size_t size,
-				dma_addr_t *dma_handle, gfp_t gfp);
-	void (*free_coherent)(struct device *dev, size_t size,
-			      void *vaddr, dma_addr_t dma_handle);
 	void* (*alloc)(struct device *dev, size_t size,
 				dma_addr_t *dma_handle, gfp_t gfp,
 				struct dma_attrs *attrs);