x86/unittests.cfg: fix tscdeadline stanzas

Add missing tscdeadline_immed test and avoid having two
extra_params declarations.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/x86/unittests.cfg b/x86/unittests.cfg
index 646055e..2117438 100644
--- a/x86/unittests.cfg
+++ b/x86/unittests.cfg
@@ -100,9 +100,13 @@
 
 [vmexit_tscdeadline]
 file = vmexit.flat
-extra_params = -append 'tscdeadline'
 groups = vmexit
-extra_params = -cpu qemu64,+x2apic,+tsc-deadline
+extra_params = -cpu qemu64,+x2apic,+tsc-deadline -append tscdeadline
+
+[vmexit_tscdeadline_immed]
+file = vmexit.flat
+groups = vmexit
+extra_params = -cpu qemu64,+x2apic,+tsc-deadline -append tscdeadline_immed
 
 [access]
 file = access.flat