netfilter: nf_flow_table: relax mixed ipv4/ipv6 flowtable dependencies

Since the offload hook code was moved, this table no longer depends on
the IPv4 and IPv6 flowtable modules
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

net/netfilter/Kconfig

@@ -666,8 +666,7 @@ endif # NF_TABLES
 
 config NF_FLOW_TABLE_INET
 	tristate "Netfilter flow table mixed IPv4/IPv6 module"
-	depends on NF_FLOW_TABLE_IPV4
-	depends on NF_FLOW_TABLE_IPV6
+	depends on NF_FLOW_TABLE
 	help
           This option adds the flow table mixed IPv4/IPv6 support.