target/riscv: Use tcg_constant_*

Replace uses of tcg_const_* with the allocate and free close together.

Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210823195529.560295-2-richard.henderson@linaro.org
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

target/riscv/insn_trans/trans_rvf.c.inc

@@ -200,12 +200,11 @@ static bool trans_fsgnjn_s(DisasContext *ctx, arg_fsgnjn_s *a)
          * Replace bit 31 in rs1 with inverse in rs2.
          * This formulation retains the nanboxing of rs1.
          */
-        mask = tcg_const_i64(~MAKE_64BIT_MASK(31, 1));
+        mask = tcg_constant_i64(~MAKE_64BIT_MASK(31, 1));
         tcg_gen_nor_i64(rs2, rs2, mask);
         tcg_gen_and_i64(rs1, mask, rs1);
         tcg_gen_or_i64(cpu_fpr[a->rd], rs1, rs2);
 
-        tcg_temp_free_i64(mask);
         tcg_temp_free_i64(rs2);
     }
     tcg_temp_free_i64(rs1);