cm4000_cs.c: Remove unnecessary cast

The struct file 'private_data' member is a void *, the cast is not needed.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Harald Welte <laforge@gnumonks.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>

drivers/char/pcmcia/cm4000_cs.c

@@ -1047,7 +1047,7 @@ static ssize_t cmm_read(struct file *filp, __user char *buf, size_t count,
 static ssize_t cmm_write(struct file *filp, const char __user *buf,
 			 size_t count, loff_t *ppos)
 {
-	struct cm4000_dev *dev = (struct cm4000_dev *) filp->private_data;
+	struct cm4000_dev *dev = filp->private_data;
 	unsigned int iobase = dev->p_dev->io.BasePort1;
 	unsigned short s;
 	unsigned char tmp;