[IPV4]: Remove ifa != NULL check.

This is a callback registered to inet address notifier chain.
The check is useless as:
- ifa is always != NULL
- similar checks are abscent in all other notifiers.
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/via-velocity.c

@@ -3460,8 +3460,6 @@ static int velocity_resume(struct pci_dev *pdev)
 static int velocity_netdev_event(struct notifier_block *nb, unsigned long notification, void *ptr)
 {
 	struct in_ifaddr *ifa = (struct in_ifaddr *) ptr;
-
-	if (ifa) {
 	struct net_device *dev = ifa->ifa_dev->dev;
 	struct velocity_info *vptr;
 	unsigned long flags;
@@ -3474,7 +3472,7 @@ static int velocity_netdev_event(struct notifier_block *nb, unsigned long notifi
 		}
 	}
 	spin_unlock_irqrestore(&velocity_dev_list_lock, flags);
-	}
+
 	return NOTIFY_DONE;
 }