target/i386/helper: Shuffle do_cpu_init()

Move the #ifdef'ry inside do_cpu_init() instead of
declaring an empty stub for user emulation.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230602224628.59546-3-philmd@linaro.org>
1 file changed