staging: speakup: add send_xchar, tiocmset and input functionality for tty

[Samuel Thibault]

Okash Khawaja, on sam. 29 avril 2017 09:41:23 +0100, wrote:
> +static int spk_ttyio_receive_buf2(struct tty_struct *tty,
> +		const unsigned char *cp, char *fp, int count)
> +{
> +	struct spk_ldisc_data *ldisc_data = (struct spk_ldisc_data *)tty->disc_data;

You can drop the cast here too :)

Samuel