tcg: Use appropriate types in tcg_reg_alloc_call

    int nb_iargs, nb_oargs, flags, nb_regs, i, reg, nb_params;

    TCGArg arg, func_arg;

    TCGTemp *ts;

    tcg_target_long stack_offset, call_stack_size, func_addr;

    intptr_t stack_offset;

    size_t call_stack_size;

    uintptr_t func_addr;

    int const_func_arg, allocate_args;

    TCGRegSet allocated_regs;

    const TCGArgConstraint *arg_ct;