[kernel][vm] Move the VM postheap init hook back one step
This is a cheesy solution to adding another top level hook, which really
should be done.
@@ -200,4 +200,4 @@ STATIC_COMMAND("vm", "vm commands", &cmd_vm)
STATIC_COMMAND_END(vm);
LK_INIT_HOOK(vm_preheap, &vm_init_preheap, LK_INIT_LEVEL_HEAP - 1);
-LK_INIT_HOOK(vm, &vm_init_postheap, LK_INIT_LEVEL_VM);
+LK_INIT_HOOK(vm, &vm_init_postheap, LK_INIT_LEVEL_VM - 1);
