dma-mapping.h, x86: remove last user of dma_mapping_ops->map_simple

pci-dma.c doesn't use map_simple hook any more so we can remove it
from struct dma_mapping_ops now.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/pci-gart_64.c

@@ -720,7 +720,6 @@ extern int agp_amd64_init(void);
 
 static struct dma_mapping_ops gart_dma_ops = {
 	.map_single			= gart_map_single,
-	.map_simple			= gart_map_simple,
 	.unmap_single			= gart_unmap_single,
 	.sync_single_for_cpu		= NULL,
 	.sync_single_for_device		= NULL,

include/asm-x86/dma-mapping.h

@@ -26,9 +26,6 @@ struct dma_mapping_ops {
 				void *vaddr, dma_addr_t dma_handle);
 	dma_addr_t      (*map_single)(struct device *hwdev, phys_addr_t ptr,
 				size_t size, int direction);
-	/* like map_single, but doesn't check the device mask */
-	dma_addr_t      (*map_simple)(struct device *hwdev, phys_addr_t ptr,
-				size_t size, int direction);
 	void            (*unmap_single)(struct device *dev, dma_addr_t addr,
 				size_t size, int direction);
 	void            (*sync_single_for_cpu)(struct device *hwdev,