ipvs: autoload ipvs on genl access

The kernel provides the functionality to automatically load modules
providing genl families. Use this to remove the need for users to
manually load the module.
Signed-off-by: NThomas Weißschuh <linux@weissschuh.net>
Acked-by: NJulian Anastasov <ja@ssi.bg>
Acked-by: NSimon Horman <horms@verge.net.au>
Signed-off-by: NPablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/ipvs/ip_vs_ctl.c

@@ -48,6 +48,8 @@
 
 #include <net/ip_vs.h>
 
+MODULE_ALIAS_GENL_FAMILY(IPVS_GENL_NAME);
+
 /* semaphore for IPVS sockopts. And, [gs]etsockopt may sleep. */
 static DEFINE_MUTEX(__ip_vs_mutex);