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/mxser.c b/drivers/char/mxser.c
index dd9d753..4d2f03e 100644
--- a/drivers/char/mxser.c
+++ b/drivers/char/mxser.c
@@ -1320,7 +1320,7 @@
 	return put_user(result, value);
 }
 
-static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
+static int mxser_tiocmget(struct tty_struct *tty)
 {
 	struct mxser_port *info = tty->driver_data;
 	unsigned char control, status;