[NET] add missing include to inetdevice.h

Signed-off-by: Arnaldo Carvalho de Melo <acme@conectiva.com.br>
Signed-off-by: David S. Miller <davem@redhat.com>

include/linux/inetdevice.h

@@ -3,7 +3,10 @@
 
 #ifdef __KERNEL__
 
+#include <linux/if.h>
+#include <linux/netdevice.h>
 #include <linux/rcupdate.h>
+#include <linux/timer.h>
 
 struct ipv4_devconf
 {