net: dccp: drop unneeded newline

DCCP_CRIT prints some other text and then a newline after the message
string, so the message string does not need to include a newline
explicitly.  Done using Coccinelle.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/dccp/ackvec.c

@@ -228,7 +228,7 @@ static void dccp_ackvec_add_new(struct dccp_ackvec *av, u32 num_packets,
 	}
 
 	if (num_cells + dccp_ackvec_buflen(av) >= DCCPAV_MAX_ACKVEC_LEN) {
-		DCCP_CRIT("Ack Vector buffer overflow: dropping old entries\n");
+		DCCP_CRIT("Ack Vector buffer overflow: dropping old entries");
 		av->av_overflow = true;
 	}