[NETFILTER]: x_tables: add missing ip6t_modulename aliases

The patch will add MODULE_ALIAS("ip6t_<modulename>") where missing,
otherwise you will get

	ip6tables: No chain/target/match by that name

when xt_<modulename> is not already loaded.

Signed-off-by: Jan Engelhardt <jengelh@computergmbh.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netfilter/xt_dccp.c b/net/netfilter/xt_dccp.c
index 83224ec..c2b1b24 100644
--- a/net/netfilter/xt_dccp.c
+++ b/net/netfilter/xt_dccp.c
@@ -24,6 +24,7 @@
 MODULE_AUTHOR("Harald Welte <laforge@netfilter.org>");
 MODULE_DESCRIPTION("Match for DCCP protocol packets");
 MODULE_ALIAS("ipt_dccp");
+MODULE_ALIAS("ip6t_dccp");
 
 #define DCCHECK(cond, option, flag, invflag) (!((flag) & (option)) \
 				  || (!!((invflag) & (option)) ^ (cond)))