remove unused gart header file

From: Jon Mason <jdmason@us.ibm.com>
include/asm-x86_64/gart-mapping.h is only ever used in
arch/x86_64/kernel/setup.c and none of its contents are referenced.
Looks to be leftover cruft not removed in the dma_ops patch.

Thanks,
Jon

Signed-off-by: Jon Mason <jdmason@us.ibm.com>
Signed-off-by: Andi Kleen <ak@suse.de>

---
 arch/x86_64/kernel/setup.c        |    1 -
 include/asm-x86_64/gart-mapping.h |   16 ----------------
 2 files changed, 17 deletions(-)

Index: linux/arch/x86_64/kernel/setup.c
===================================================================
--- linux.orig/arch/x86_64/kernel/setup.c
+++ linux/arch/x86_64/kernel/setup.c
@@ -65,7 +65,6 @@
 #include <asm/numa.h>
 #include <asm/swiotlb.h>
 #include <asm/sections.h>
-#include <asm/gart-mapping.h>
 #include <asm/dmi.h>
 
 /*
Index: linux/include/asm-x86_64/gart-mapping.h
===================================================================
--- linux.orig/include/asm-x86_64/gart-mapping.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#ifndef _X8664_GART_MAPPING_H
-#define _X8664_GART_MAPPING_H 1
-
-#include <linux/types.h>
-#include <asm/types.h>
-
-struct device;
-
-extern void*
-gart_alloc_coherent(struct device *dev, size_t size,
-        dma_addr_t *dma_handle, gfp_t gfp);
-
-extern int
-gart_dma_supported(struct device *hwdev, u64 mask);
-
-#endif /* _X8664_GART_MAPPING_H */