selftests: sync_test: do not use ksft_exit_skip after ksft_set_plan

Calling ksft_exit_skip after ksft_set_plan results in executing fewer tests
than planned.  Move it before.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/sync/sync_test.c

@@ -86,9 +86,9 @@ int main(void)
 	int err;
 
 	ksft_print_header();
-	ksft_set_plan(3 + 7);
 
 	sync_api_supported();
+	ksft_set_plan(3 + 7);
 
 	ksft_print_msg("[RUN]\tTesting sync framework\n");