KVM: ia64: Add interruption vector table for vmm

vmm_ivt.S includes an ivt for vmm use.
Signed-off-by: NAnthony Xu <anthony.xu@intel.com>
Signed-off-by: NXiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: NAvi Kivity <avi@qumranet.com>