dst: don't inline dst_ifdown

The function dst_ifdown is called only two places but in a non-
performance critical code path, there is no reason to inline it.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/dst.c

@@ -286,7 +286,7 @@ EXPORT_SYMBOL(dst_release);
  *
  * Commented and originally written by Alexey.
  */
-static inline void dst_ifdown(struct dst_entry *dst, struct net_device *dev,
+static void dst_ifdown(struct dst_entry *dst, struct net_device *dev,
 		       int unregister)
 {
 	if (dst->ops->ifdown)