Remove the #ifdef !defined(CONFIG_USER_ONLY) that surrounds
the whole file, and move helper.c to nios2_softmmu_ss.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20220421151735.31996-12-richard.henderson@linaro.org>