tty: pty: correct function name pty_resize()

Fix the following make W=1 kernel build warning:

  drivers/tty/pty.c:307: warning: expecting prototype for pty_do_resize(). Prototype was for pty_resize() instead

Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20210518045353.611017-1-yangyingliang@huawei.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/pty.c

@@ -282,7 +282,7 @@ static void pty_set_termios(struct tty_struct *tty,
 }
 
 /**
- *	pty_do_resize		-	resize event
+ *	pty_resize		-	resize event
  *	@tty: tty being resized
  *	@ws: window size being set.
  *