netfilter: add missing dependency to kmod-ipt-tproxy

Fixes: e7e025426a "netfilter: clean up dependencies of kernel modules"
Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>

package/kernel/linux/modules/netfilter.mk

@@ -503,7 +503,7 @@ $(eval $(call KernelPackage,ipt-led))
 
 define KernelPackage/ipt-tproxy
   TITLE:=Transparent proxying support
-  DEPENDS+=+kmod-ipt-conntrack +IPV6:kmod-ip6tables
+  DEPENDS+=+kmod-ipt-conntrack +IPV6:kmod-nf-conntrack6 +IPV6:kmod-ip6tables
   KCONFIG:= \
   	CONFIG_NETFILTER_XT_MATCH_SOCKET \
   	CONFIG_NETFILTER_XT_TARGET_TPROXY