x86: tsc: add test for RDTSCP

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/x86/unittests.cfg b/x86/unittests.cfg
index ac652fc..fd7e9b2 100644
--- a/x86/unittests.cfg
+++ b/x86/unittests.cfg
@@ -114,6 +114,7 @@
 
 [tsc]
 file = tsc.flat
+extra_params = -cpu kvm64,+rdtscp
 
 [tsc_adjust]
 file = tsc_adjust.flat