x86: remove ifdef CONFIG_CALGARY_IOMMU in pci-dma.c

asm-x86/calgary.h has dummy calgary_iommu_init() and detect_calgary()
in !CONFIG_CALGARY_IOMMU case. So we don't need ifdef
CONFIG_CALGARY_IOMMU in pci-dma.c.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Acked-by: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: Alexis Bruemmer <alexisb@us.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index dd57c5b..f16cbbe 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -116,9 +116,7 @@
 	 */
 	gart_iommu_hole_init();
 
-#ifdef CONFIG_CALGARY_IOMMU
 	detect_calgary();
-#endif
 
 	detect_intel_iommu();
 
@@ -496,9 +494,7 @@
 
 static int __init pci_iommu_init(void)
 {
-#ifdef CONFIG_CALGARY_IOMMU
 	calgary_iommu_init();
-#endif
 
 	intel_iommu_init();