KVM: rename vtd.c to iommu.c

Impact: file renamed

The code in the vtd.c file can be reused for other IOMMUs as well. So
rename it to make it clear that it handle more than VT-d.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

arch/ia64/kvm/Makefile

@@ -52,7 +52,7 @@ common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \
 		coalesced_mmio.o irq_comm.o)
 
 ifeq ($(CONFIG_DMAR),y)
-common-objs += $(addprefix ../../../virt/kvm/, vtd.o)
+common-objs += $(addprefix ../../../virt/kvm/, iommu.o)
 endif
 
 kvm-objs := $(common-objs) kvm-ia64.o kvm_fw.o

arch/x86/kvm/Makefile

@@ -8,7 +8,7 @@ ifeq ($(CONFIG_KVM_TRACE),y)
 common-objs += $(addprefix ../../../virt/kvm/, kvm_trace.o)
 endif
 ifeq ($(CONFIG_DMAR),y)
-common-objs += $(addprefix ../../../virt/kvm/, vtd.o)
+common-objs += $(addprefix ../../../virt/kvm/, iommu.o)
 endif
 
 EXTRA_CFLAGS += -Ivirt/kvm -Iarch/x86/kvm