llc: Make llc_conn_ev_qfyr_t function pointer arrays const

It's better when function pointer arrays aren't modifiable.

Net change from original:

$ size net/llc/built-in.o.*
   text	   data	    bss	    dec	    hex	filename
  61065	  12886	   1344	  75295	  1261f	net/llc/built-in.o.new
  47113	  27030	   1344	  75487	  126df	net/llc/built-in.o.old
Signed-off-by: NJoe Perches <joe@perches.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

include/net/llc_c_st.h

@@ -35,7 +35,7 @@
 struct llc_conn_state_trans {
 	llc_conn_ev_t	   ev;
 	u8		   next_state;
-	llc_conn_ev_qfyr_t *ev_qualifiers;
+	const llc_conn_ev_qfyr_t *ev_qualifiers;
 	const llc_conn_action_t  *ev_actions;
 };
 

net/llc/llc_conn.c

@@ -406,7 +406,7 @@ static struct llc_conn_state_trans *llc_qualify_conn_ev(struct sock *sk,
 							struct sk_buff *skb)
 {
 	struct llc_conn_state_trans **next_trans;
-	llc_conn_ev_qfyr_t *next_qualifier;
+	const llc_conn_ev_qfyr_t *next_qualifier;
 	struct llc_conn_state_ev *ev = llc_conn_ev(skb);
 	struct llc_sock *llc = llc_sk(sk);
 	struct llc_conn_state *curr_state =