[IRDA] irda-usb: use NULL instead of 0

Use NULL instead of 0 for a null pointer value (sparse warning):

drivers/net/irda/irda-usb.c:1781:30: warning: Using plain integer as NULL pointer

Also, correct timeout argument to use milliseconds instead of jiffies.
Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/irda/irda-usb.c

@@ -1778,7 +1778,7 @@ static int irda_usb_probe(struct usb_interface *intf,
 
 	if (self->needspatch) {
 		ret = usb_control_msg (self->usbdev, usb_sndctrlpipe (self->usbdev, 0),
-				       0x02, 0x40, 0, 0, 0, 0, msecs_to_jiffies(500));
+				       0x02, 0x40, 0, 0, NULL, 0, 500);
 		if (ret < 0) {
 			IRDA_DEBUG (0, "usb_control_msg failed %d\n", ret);
 			goto err_out_3;