tcg/mips: fix store softmmu slow path

Commit 9d8bf2d moved the softmmu slow path out of line and introduce a
regression at the same time by always calling tcg_out_tlb_load with
is_load=1. This makes impossible to run any significant code under
qemu-system-mips*.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: qemu-stable@nongnu.org
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
(cherry picked from commit 0a2923f)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

tcg/mips/tcg-target.c

@@ -1302,7 +1302,7 @@ static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64)
        so we can reuse that for the base.  */
     base = (TARGET_LONG_BITS == 32 ? TCG_REG_A1 : TCG_REG_A2);
     tcg_out_tlb_load(s, base, addr_regl, addr_regh, mem_index,
-                     s_bits, label_ptr, 1);
+                     s_bits, label_ptr, 0);
     tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc);
     add_qemu_ldst_label(s, 0, opc, data_regl, data_regh, addr_regl, addr_regh,
                         mem_index, s->code_ptr, label_ptr);