[GENL]: Add genlmsg_reply() to simply unicast replies to requests

A generic netlink user has no interest in knowing how to
address the source of the original request.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Paul Moore <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/netlink/genetlink.c b/net/netlink/genetlink.c
index 70d60c8..0249a56 100644
--- a/net/netlink/genetlink.c
+++ b/net/netlink/genetlink.c
@@ -529,7 +529,7 @@
 		goto errout;
 	}
 
-	err = genlmsg_unicast(msg, info->snd_pid);
+	err = genlmsg_reply(msg, info);
 errout:
 	return err;
 }