tty: move tioclinux from a special case

Right now we have ifdefs and hooks in the core ioctl handler for TIOCLINUX
and then test if its a console. This is brain dead. Instead call the
tioclinux helper from the relevant driver ioctl methods.

Signed-off-by: Alan Cox <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/char/tty_io.c

···
 		return put_user(tty->ldisc.ops->num, (int __user *)p);
 	case TIOCSETD:
 		return tiocsetd(tty, p);
-#ifdef CONFIG_VT
-	case TIOCLINUX:
-		return tioclinux(tty, arg);
-#endif
 	/*
 	 * Break handling
 	 */

drivers/char/vt.c

···
 	int lines;
 	int ret;
 
-	if (tty->driver->type != TTY_DRIVER_TYPE_CONSOLE)
-		return -EINVAL;
 	if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
 		return -EPERM;
 	if (get_user(type, p))

drivers/char/vt_ioctl.c

···
  
 	kbd = kbd_table + console;
 	switch (cmd) {
+	case TIOCLINUX:
+		return tioclinux(tty, arg);
 	case KIOCSOUND:
 		if (!perm)
 			goto eperm;