tty: Remove some pointless casts

disc_data and driver_data are void *

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/char/vt_ioctl.c b/drivers/char/vt_ioctl.c
index 8944ce5..a2dee0e 100644
--- a/drivers/char/vt_ioctl.c
+++ b/drivers/char/vt_ioctl.c
@@ -366,7 +366,7 @@
 int vt_ioctl(struct tty_struct *tty, struct file * file,
 	     unsigned int cmd, unsigned long arg)
 {
-	struct vc_data *vc = (struct vc_data *)tty->driver_data;
+	struct vc_data *vc = tty->driver_data;
 	struct console_font_op op;	/* used in multiple places here */
 	struct kbd_struct * kbd;
 	unsigned int console;