KVM: Remove useless intel-iommu.h header inclusion

Currently "#include <linux/intel-iommu.h>" is not needed in
virt/kvm/kvm_main.c.

Signed-off-by: Weidong Han <weidong.han@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

virt/kvm/kvm_main.c

@@ -41,7 +41,6 @@
 #include <linux/pagemap.h>
 #include <linux/mman.h>
 #include <linux/swap.h>
-#include <linux/intel-iommu.h>
 
 #include <asm/processor.h>
 #include <asm/io.h>