target/xtensa: fix missing tcg_temp_free in gen_window_check

pc and w are allocated with tcg_const_i32 but not freed in
gen_window_check. Use tcg_constant_i32 for them both.

Fixes: 2db59a7 ("target-xtensa: record available window in TB flags")
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

target/xtensa/translate.c

@@ -571,8 +571,8 @@ static bool gen_window_check(DisasContext *dc, uint32_t mask)
     unsigned r = 31 - clz32(mask);
 
     if (r / 4 > dc->window) {
-        TCGv_i32 pc = tcg_const_i32(dc->pc);
-        TCGv_i32 w = tcg_const_i32(r / 4);
+        TCGv_i32 pc = tcg_constant_i32(dc->pc);
+        TCGv_i32 w = tcg_constant_i32(r / 4);
 
         gen_helper_window_check(cpu_env, pc, w);
         dc->base.is_jmp = DISAS_NORETURN;