sctp: fix cut and paste issue in comment

Cookie ACK is always received by the association initiator, so fix the
comment to avoid confusion.

Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/sctp/sm_statefuns.c

@@ -853,7 +853,7 @@ nomem:
 
 /*
  * Respond to a normal COOKIE ACK chunk.
- * We are the side that is being asked for an association.
+ * We are the side that is asking for an association.
  *
  * RFC 2960 5.1 Normal Establishment of an Association
  *