[NETNS][IPV6] route6 - Pass the network namespace parameter to rt6_purge_dflt_routers

Add a network namespace parameter to rt6_purge_dflt_routers.  This is
needed to call fib6_get_table with the appropriate network namespace.

Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
Signed-off-by: Benjamin Thery <benjamin.thery@bull.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/ip6_route.h b/include/net/ip6_route.h
index 92004c5..1444d35 100644
--- a/include/net/ip6_route.h
+++ b/include/net/ip6_route.h
@@ -95,7 +95,7 @@
 						    struct net_device *dev,
 						    unsigned int pref);
 
-extern void			rt6_purge_dflt_routers(void);
+extern void			rt6_purge_dflt_routers(struct net *net);
 
 extern int			rt6_route_rcv(struct net_device *dev,
 					      u8 *opt, int len,