v6: rename delete_chain() to delete_chain6()

Signed-off-by: Maciej Zenczykowski <maze@google.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/include/ip6tables.h b/include/ip6tables.h
index 672faed..48633b7 100644
--- a/include/ip6tables.h
+++ b/include/ip6tables.h
@@ -12,7 +12,7 @@
 
 extern int for_each_chain6(int (*fn)(const ip6t_chainlabel, int, struct ip6tc_handle *), int verbose, int builtinstoo, struct ip6tc_handle *handle);
 extern int flush_entries6(const ip6t_chainlabel chain, int verbose, struct ip6tc_handle *handle);
-extern int delete_chain(const ip6t_chainlabel chain, int verbose, struct ip6tc_handle *handle);
+extern int delete_chain6(const ip6t_chainlabel chain, int verbose, struct ip6tc_handle *handle);
 void print_rule(const struct ip6t_entry *e, struct ip6tc_handle *h, const char *chain, int counters);
 
 extern struct xtables_globals ip6tables_globals;