inet: fix warning about missing prototype

The prototype for inet_rcv_saddr_equal was not being included.
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/ipv4/inet_connection_sock.c

@@ -25,6 +25,7 @@
 #include <net/xfrm.h>
 #include <net/tcp.h>
 #include <net/sock_reuseport.h>
+#include <net/addrconf.h>
 
 #ifdef INET_CSK_DEBUG
 const char inet_csk_timer_bug_msg[] = "inet_csk BUG: unknown timer value\n";