[IA64] Build VT-D iommu support into generic kernel

Now that all the ia64 mmu pieces are in the tree we can build
support into the generic kernel.

Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/Kconfig

@@ -148,6 +148,7 @@ config IA64_GENERIC
 	select ACPI_NUMA
 	select SWIOTLB
 	select PCI_MSI
+	select DMAR
 	help
 	  This selects the system type of your hardware.  A "generic" kernel
 	  will run on any supported IA-64 system.  However, if you configure