target/ppc: Remove special case for POWERPC_EXCP_TRAP

Since POWERPC_EXCP_TRAP is raised by gen_exception_err,
we will have also set DISAS_NORETURN.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Luis Pires <luis.pires@eldorado.org.br>
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20210512185441.3619828-6-matheus.ferst@eldorado.org.br>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

target/ppc/translate.c

@@ -9225,7 +9225,6 @@ static void ppc_tr_translate_insn(DisasContextBase *dcbase, CPUState *cs)
     /* Check trace mode exceptions */
     if (unlikely(ctx->singlestep_enabled & CPU_SINGLE_STEP &&
                  (ctx->base.pc_next <= 0x100 || ctx->base.pc_next > 0xF00) &&
-                 ctx->exception != POWERPC_EXCP_TRAP &&
                  ctx->exception != POWERPC_EXCP_BRANCH &&
                  ctx->base.is_jmp != DISAS_NORETURN)) {
         uint32_t excp = gen_prep_dbgex(ctx);