tty: phase out of ioctl file pointer for tty3270 as well

The patch "tty: now phase out the ioctl file pointer for good" missed
the tty3270 driver. This is the missing piece.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/s390/char/keyboard.c b/drivers/s390/char/keyboard.c
index 8cd58e4..d667334 100644
--- a/drivers/s390/char/keyboard.c
+++ b/drivers/s390/char/keyboard.c
@@ -455,9 +455,7 @@
 	return 0;
 }
 
-int
-kbd_ioctl(struct kbd_data *kbd, struct file *file,
-	  unsigned int cmd, unsigned long arg)
+int kbd_ioctl(struct kbd_data *kbd, unsigned int cmd, unsigned long arg)
 {
 	void __user *argp;
 	int ct, perm;