[Kernel] Use single page to store all Vd pointers and structs

This is to prevent some titles from reaching out of memory crash

src/xenia/memory.cc

@@ -284,10 +284,16 @@ bool Memory::Initialize() {
   heaps_.vA0000000.Alloc(0x340000, 64 * 1024, kMemoryAllocationReserve,
                          kMemoryProtectNoAccess, true, &unk_phys_alloc);
 
-  uint32_t unknown_xex_range;  // Probably hypervisor?
+  // Allocate memory hypervisor and kernel would use
+  uint32_t hypervisor_range;
   heaps_.v80000000.Alloc(0x40000, 4 * 1024, kMemoryAllocationCommit,
                          kMemoryProtectRead | kMemoryProtectWrite, false,
-                         &unknown_xex_range);
+                         &hypervisor_range);
+
+  uint32_t kernel_range;
+  heaps_.v80000000.Alloc(0x1C0000, 4 * 1024, kMemoryAllocationCommit,
+                         kMemoryProtectRead | kMemoryProtectWrite, false,
+                         &kernel_range);
 
   // Value taken from 544307D5. Title explicitly access this address and this is
   // a value underneath it (It's constant between multiple runs)