In preparation of introducing paired registers,
massage a bit process_op_defs()'s switch case.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
[PMD: Split from bigger patch, 1/3]
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221219220925.79218-2-philmd@linaro.org>