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/isdn/capi/capi.c b/drivers/isdn/capi/capi.c
index f80a7c4..0d70883 100644
--- a/drivers/isdn/capi/capi.c
+++ b/drivers/isdn/capi/capi.c
@@ -1219,16 +1219,10 @@
 	return mp->outbytes;
 }
 
-static int capinc_tty_ioctl(struct tty_struct *tty, struct file * file,
+static int capinc_tty_ioctl(struct tty_struct *tty,
 		    unsigned int cmd, unsigned long arg)
 {
-	int error = 0;
-	switch (cmd) {
-	default:
-		error = n_tty_ioctl_helper(tty, file, cmd, arg);
-		break;
-	}
-	return error;
+	return -ENOIOCTLCMD;
 }
 
 static void capinc_tty_set_termios(struct tty_struct *tty, struct ktermios * old)