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 <[e-mail]>
Signed-off-by: Yang Yingliang <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/pty.c

···
 }
 
 /**
- *	pty_do_resize		-	resize event
+ *	pty_resize		-	resize event
  *	@tty: tty being resized
  *	@ws: window size being set.
  *