[IA64] Clean up VTi memory initialization logic

This patch makes the logic in setup_guest() more clear.
domain_translate_gpfn_list() is now gone, so we can make
memory initializtion code simple.
Xend passes memory size which is a sum of normal memory
size and GFW memory to QEMU and Libxc. This patch fixes
this issue.

Signed-off-by: Zhang Xin <xing.z.zhang@intel.com>

tools/python/xen/xend/image.py

@@ -591,6 +591,9 @@ class IA64_HVM_ImageHandler(HVMImageHandler):
         extra_pages = 1024 + 3
         return mem_kb + extra_pages * page_kb
 
+    def getRequiredInitialReservation(self):
+        return self.vm.getMemoryTarget()
+
     def getRequiredShadowMemory(self, shadow_mem_kb, maxmem_kb):
         # Explicit shadow memory is not a concept 
         return 0