KVM: selftests: Use vm_create() in tsc_scaling_sync

Use vm_create() instead of vm_create_default_with_vcpus() in
tsc_scaling_sync.  The existing call doesn't create any vCPUs, and the
guest_code() entry point is set when vm_vcpu_add_default() is invoked.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

tools/testing/selftests/kvm/x86_64/tsc_scaling_sync.c

@@ -98,7 +98,7 @@ int main(int argc, char *argv[])
 		exit(KSFT_SKIP);
 	}
 
-	vm = vm_create_default_with_vcpus(0, DEFAULT_STACK_PGS * NR_TEST_VCPUS, 0, guest_code, NULL);
+	vm = vm_create(DEFAULT_GUEST_PHY_PAGES + DEFAULT_STACK_PGS * NR_TEST_VCPUS);
 	vm_ioctl(vm, KVM_SET_TSC_KHZ, (void *) TEST_TSC_KHZ);
 
 	pthread_spin_init(&create_lock, PTHREAD_PROCESS_PRIVATE);