Bluetooth: Use const for struct l2cap_ops field

The struct l2cap_ops field should not allow any modifications and thus
it is better declared as const.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/net/bluetooth/l2cap_sock.c b/net/bluetooth/l2cap_sock.c
index e137869..11e2207 100644
--- a/net/bluetooth/l2cap_sock.c
+++ b/net/bluetooth/l2cap_sock.c
@@ -1375,7 +1375,7 @@
 	sk->sk_state_change(sk);
 }
 
-static struct l2cap_ops l2cap_chan_ops = {
+static const struct l2cap_ops l2cap_chan_ops = {
 	.name		= "L2CAP Socket Interface",
 	.new_connection	= l2cap_sock_new_connection_cb,
 	.recv		= l2cap_sock_recv_cb,