pkt_sched: Make act_csum depend upon INET.

It uses ip_send_check() and stuff like that.

Reported-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 522d5a9..a36270a 100644
--- a/net/sched/Kconfig
+++ b/net/sched/Kconfig
@@ -520,7 +520,7 @@
 
 config NET_ACT_CSUM
         tristate "Checksum Updating"
-        depends on NET_CLS_ACT
+        depends on NET_CLS_ACT && INET
         ---help---
 	  Say Y here to update some common checksum after some direct
 	  packet alterations.