ia64: remove the unused iommu_dma_init function

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/include/asm/iommu.h

@@ -15,7 +15,6 @@ extern int iommu_detected;
 #define no_iommu		(1)
 #define iommu_detected		(0)
 #endif
-extern void iommu_dma_init(void);
 extern void machvec_init(const char *name);
 
 #endif

arch/ia64/kernel/pci-dma.c

@@ -37,12 +37,6 @@ static int __init pci_iommu_init(void)
 /* Must execute after PCI subsystem */
 fs_initcall(pci_iommu_init);
 
-void __init
-iommu_dma_init(void)
-{
-	return;
-}
-
 void __init pci_iommu_alloc(void)
 {
 	dma_ops = &intel_dma_ops;