VMX: adjust correct table when there's no posted interrupt support

The caller of start_vmx() will overwrite hvm_funcs, so there's no point
in adjusting that table in start_vmx().

Signed-off-by: Jan Beulich <jbeulich@suse.com>

xen/arch/x86/hvm/vmx/vmx.c

@@ -1585,8 +1585,8 @@ struct hvm_function_table * __init start_vmx(void)
         alloc_direct_apic_vector(&posted_intr_vector, event_check_interrupt);
     else
     {
-        hvm_funcs.deliver_posted_intr = NULL;
-        hvm_funcs.sync_pir_to_irr = NULL;
+        vmx_function_table.deliver_posted_intr = NULL;
+        vmx_function_table.sync_pir_to_irr = NULL;
     }
 
     setup_vmcs_dump();