netfilter: xt_realm: fix unmet direct dependencies

scripts/kconfig/conf --silentoldconfig Kconfig
warning: (NETFILTER_XT_MATCH_REALM) selects NET_CLS_ROUTE which has unmet direct dependencies (NET && NET_SCHED)
warning: (NETFILTER_XT_MATCH_REALM) selects NET_CLS_ROUTE which has unmet direct dependencies (NET && NET_SCHED)

Reported by: Valdis Kletnieks <Valdis.Kletnieks@vt.edu>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index 1534f2b..ae56764 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -886,7 +886,8 @@ config NETFILTER_XT_MATCH_RATEEST
 config NETFILTER_XT_MATCH_REALM
 	tristate  '"realm" match support'
 	depends on NETFILTER_ADVANCED
-	select NET_CLS_ROUTE
+	depends on NET_SCHED
+	depends on NET_CLS_ROUTE
 	help
 	  This option adds a `realm' match, which allows you to use the realm
 	  key from the routing subsystem inside iptables.