svm: Fix nmi hlt test to fail test correctly

The last test does not return vmmcall on fail resulting
in passing the entire test.

Signed-off-by: Cathy Avery <cavery@redhat.com>
Message-Id: <20200428184100.5426-1-cavery@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/x86/svm_tests.c b/x86/svm_tests.c
index 727870a..2f53b8f 100644
--- a/x86/svm_tests.c
+++ b/x86/svm_tests.c
@@ -1480,6 +1480,7 @@
     if (!nmi_fired) {
         report(nmi_fired, "intercepted pending NMI not dispatched");
         set_test_stage(test, -1);
+        vmmcall();
     }
 
     set_test_stage(test, 3);