[IA64] Expand hvm_op hypercall for PV-on-HVM/IPF

[IA64] Expand hvm_op hypercall for PV-on-HVM/IPF

Introduce HVMOP_setup_shared_info_page
 - A page allocated on HVM-guest OS is swapped original shared_info
   page with this hypercall.
 - In x86 code, original shared_info page is used after pv-on-hvm
   setup with remapping feature in arch depend HYPERVISOR_memory_op.
   But, we can't implement same feature for IPF, thus we select to
   implement with this method.
Introduce HVMOP_setup_gnttab_table
 - Pages allocated on HVM-guest OS is swapped original grant_table
   page frames with this hypercall.
 - Same above.

Signed-off-by: Tsunehisa Doi <Doi.Tsunehisa@jp.fujitsu.com>
Signed-off-by: Tomonari Horikoshi <t.horikoshi@jp.fujitsu.com>