Bluetooth: Use macro for L2CAP hint mask on receiving config request

Using the L2CAP_CONF_HINT macro is easier to understand than using a
hardcoded 0x80 value.

Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index ff1744e..c0c0915 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -1739,7 +1739,7 @@
 	while (len >= L2CAP_CONF_OPT_SIZE) {
 		len -= l2cap_get_conf_opt(&req, &type, &olen, &val);
 
-		hint  = type & 0x80;
+		hint  = type & L2CAP_CONF_HINT;
 		type &= 0x7f;
 
 		switch (type) {