net/sched: Kconfig: select LIBCRC32C if NET_ACT_CSUM is selected

LIBCRC32C is needed to compute crc32c on SCTP packets.
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sched/Kconfig

@@ -707,6 +707,7 @@ config NET_ACT_SKBEDIT
 config NET_ACT_CSUM
         tristate "Checksum Updating"
         depends on NET_CLS_ACT && INET
+        select LIBCRC32C
         ---help---
 	  Say Y here to update some common checksum after some direct
 	  packet alterations.