tiocmget: kill off the passing of the struct file

We don't actually need this and it causes problems for internal use of
this functionality. Currently there is a single use of the FILE * pointer.
That is the serial core which uses it to check tty_hung_up_p. However if
that is true then IO_ERROR is also already set so the check may be removed.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/char/isicom.c b/drivers/char/isicom.c
index c27e9d2..836370b 100644
--- a/drivers/char/isicom.c
+++ b/drivers/char/isicom.c
@@ -1065,7 +1065,7 @@
 	return 0;
 }
 
-static int isicom_tiocmget(struct tty_struct *tty, struct file *file)
+static int isicom_tiocmget(struct tty_struct *tty)
 {
 	struct isi_port *port = tty->driver_data;
 	/* just send the port status */