networking: NET_CLS_ROUTE4 depends on INET

IP_ROUTE_CLASSID depends on INET and NET_CLS_ROUTE4 selects
IP_ROUTE_CLASSID, but when INET is not enabled, this kconfig warning
is produced, so fix it by making NET_CLS_ROUTE4 depend on INET.

warning: (NET_CLS_ROUTE4) selects IP_ROUTE_CLASSID which has unmet direct dependencies (NET && INET)

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sched/Kconfig b/net/sched/Kconfig
index aeaa211..2590e91 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -288,6 +288,7 @@
 
 config NET_CLS_ROUTE4
 	tristate "Routing decision (ROUTE)"
+	depends on INET
 	select IP_ROUTE_CLASSID
 	select NET_CLS
 	---help---