[PATCH] Don't set calgary iommu as default y

Most systems don't need it.

Signed-off-by: Andi Kleen <ak@suse.de>
diff --git a/arch/x86_64/Kconfig b/arch/x86_64/Kconfig
index c2c68b9..294bf77 100644
--- a/arch/x86_64/Kconfig
+++ b/arch/x86_64/Kconfig
@@ -422,7 +422,6 @@
 
 config CALGARY_IOMMU
 	bool "IBM Calgary IOMMU support"
-	default y
 	select SWIOTLB
 	depends on PCI && EXPERIMENTAL
 	help