Bluetooth: remove magic offset and size

make code readable by removing magic numbers
Signed-off-by: NAndrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: NGustavo F. Padovan <padovan@profusion.mobi>

net/bluetooth/l2cap_core.c

@@ -3021,7 +3021,7 @@ static inline int l2cap_information_req(struct l2cap_conn *conn, struct l2cap_cm
 		struct l2cap_info_rsp *rsp = (struct l2cap_info_rsp *) buf;
 		rsp->type   = cpu_to_le16(L2CAP_IT_FIXED_CHAN);
 		rsp->result = cpu_to_le16(L2CAP_IR_SUCCESS);
-		memcpy(buf + 4, l2cap_fixed_chan, 8);
+		memcpy(rsp->data, l2cap_fixed_chan, sizeof(l2cap_fixed_chan));
 		l2cap_send_cmd(conn, cmd->ident,
 					L2CAP_INFO_RSP, sizeof(buf), buf);
 	} else {