tty: now phase out the ioctl file pointer for good

Only oddities here are a couple of drivers that bogusly called the ldisc
helpers instead of returning -ENOIOCTLCMD. Fix the bug and the rest goes
away.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c
index 956e1d6..2ad58a0 100644
--- a/drivers/net/usb/hso.c
+++ b/drivers/net/usb/hso.c
@@ -1730,7 +1730,7 @@
 			       USB_CTRL_SET_TIMEOUT);
 }
 
-static int hso_serial_ioctl(struct tty_struct *tty, struct file *file,
+static int hso_serial_ioctl(struct tty_struct *tty,
 			    unsigned int cmd, unsigned long arg)
 {
 	struct hso_serial *serial =  get_serial_by_tty(tty);