target/hppa: Clear psw_n for BE on use_nullify_skip path

Along this path we have already skipped the insn to be
nullified, so the subsequent insn should be executed.

Cc: qemu-stable@nongnu.org
Reported-by: Sven Schnelle <svens@stackframe.org>
Tested-by: Sven Schnelle <svens@stackframe.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
(cherry picked from commit 4a3aa11)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

target/hppa/translate.c

@@ -3473,6 +3473,7 @@ static bool trans_be(DisasContext *ctx, arg_be *a)
         tcg_gen_addi_reg(cpu_iaoq_b, cpu_iaoq_f, 4);
         tcg_gen_mov_i64(cpu_iasq_f, new_spc);
         tcg_gen_mov_i64(cpu_iasq_b, cpu_iasq_f);
+        nullify_set(ctx, 0);
     } else {
         copy_iaoq_entry(cpu_iaoq_f, ctx->iaoq_b, cpu_iaoq_b);
         if (ctx->iaoq_b == -1) {