kernel: act_ctinfo: fixup build error on 4.14

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

target/linux/generic/backport-4.14/380-v5.3-net-sched-Introduce-act_ctinfo-action.patch

@@ -112,7 +112,7 @@ Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
  include/uapi/linux/tc_act/tc_ctinfo.h |  29 ++
  net/sched/Kconfig                     |  13 +
  net/sched/Makefile                    |   1 +
- net/sched/act_ctinfo.c                | 404 ++++++++++++++++++++++++++
+ net/sched/act_ctinfo.c                | 405 ++++++++++++++++++++++++++
  6 files changed, 482 insertions(+), 1 deletion(-)
  create mode 100644 include/net/tc_act/tc_ctinfo.h
  create mode 100644 include/uapi/linux/tc_act/tc_ctinfo.h
@@ -232,7 +232,7 @@ Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
  obj-$(CONFIG_NET_IFE_SKBMARK)	+= act_meta_mark.o
 --- /dev/null
 +++ b/net/sched/act_ctinfo.c
-@@ -0,0 +1,404 @@
+@@ -0,0 +1,405 @@
 +// SPDX-License-Identifier: GPL-2.0+
 +/* net/sched/act_ctinfo.c  netfilter ctinfo connmark actions
 + *
@@ -579,6 +579,7 @@ Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>
 +	return tcf_idr_search(tn, a, index);
 +}
 +
++static void tcf_ctinfo_cleanup(struct tc_action *a)
 +{
 +	struct tcf_ctinfo *ci = to_ctinfo(a);
 +	struct tcf_ctinfo_params *cp;