bgpd: fix BGP IPv6 route map error

BGP refactoring in commit f3cfc46450cccc5ac035a5a97c5a1a5484205705
introduced an error which broke route map processing for IPv6 where
AFI_IP was used instead of AFI_IP6.

This patch fixes the typo.

Signed-off-by: Andrej Ota <andrej@ota.si>
Tested-by: NetDEF CI System <cisystem@netdef.org>
diff --git a/bgpd/bgp_routemap.c b/bgpd/bgp_routemap.c
index 39fa08c..98d5f1f 100644
--- a/bgpd/bgp_routemap.c
+++ b/bgpd/bgp_routemap.c
@@ -2389,7 +2389,7 @@
 	      route_map_lookup_by_name (bgp->rmap[AFI_IP][i].name);
 	  if (bgp->rmap[AFI_IP6][i].name)
 	    bgp->rmap[AFI_IP6][i].map =
-	      route_map_lookup_by_name (bgp->rmap[AFI_IP][i].name);
+	      route_map_lookup_by_name (bgp->rmap[AFI_IP6][i].name);
 	}
     }
 }