tty: fix tty_ldisc_receive_buf() documentation

The tty_ldisc_receive_buf() helper returns the number of bytes
processed so drop the bogus "not" from the kernel doc comment.

Fixes: 8d082cd300ab ("tty: Unify receive_buf() code paths")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/tty_buffer.c

@@ -446,7 +446,7 @@ EXPORT_SYMBOL_GPL(tty_prepare_flip_string);
  *	Callers other than flush_to_ldisc() need to exclude the kworker
  *	from concurrent use of the line discipline, see paste_selection().
  *
- *	Returns the number of bytes not processed
+ *	Returns the number of bytes processed
  */
 int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
 			  char *f, int count)