target/i386: Simplify i386_tr_init_disas_context()

Since cpu_mmu_index() is well-defined for user-only,
we can remove the surrounding #ifdef'ry entirely.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230613133347.82210-2-philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

target/i386/tcg/translate.c

@@ -6914,10 +6914,7 @@ static void i386_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cpu)
     dc->cc_op_dirty = false;
     dc->popl_esp_hack = 0;
     /* select memory access functions */
-    dc->mem_index = 0;
-#ifdef CONFIG_SOFTMMU
     dc->mem_index = cpu_mmu_index(env, false);
-#endif
     dc->cpuid_features = env->features[FEAT_1_EDX];
     dc->cpuid_ext_features = env->features[FEAT_1_ECX];
     dc->cpuid_ext2_features = env->features[FEAT_8000_0001_EDX];