target/mips: Fix TCG temporary leak in gen_cache_operation()

Fix a TCG temporary leak when translating CACHE opcode.

Fixes: 0d74a22 ("make ITC Configuration Tags accessible to the CPU")
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210406202857.1440744-1-f4bug@amsat.org>

target/mips/translate.c

@@ -12804,6 +12804,8 @@ static void gen_cache_operation(DisasContext *ctx, uint32_t op, int base,
     TCGv t1 = tcg_temp_new();
     gen_base_offset_addr(ctx, t1, base, offset);
     gen_helper_cache(cpu_env, t1, t0);
+    tcg_temp_free(t1);
+    tcg_temp_free_i32(t0);
 }
 
 #if defined(TARGET_MIPS64)