ia64/pv_ops: fix paravirtualization of ivt.S with CONFIG_SMP=n

When CONFIG_SMP=n, three instruction in ivt.S were missed to paravirtualize.
paravirtualize them.

Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Tony Luck <tony.luck@intel.com>