[Bluetooth] Add basics to better support and handle eSCO links

To better support and handle eSCO links in the future a bunch of
constants needs to be added and some basic routines need to be
updated. This is the initial step.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 9c71cff..f6d867e 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -851,6 +851,7 @@
 
 	hdev->flags = 0;
 	hdev->pkt_type  = (HCI_DM1 | HCI_DH1 | HCI_HV1);
+	hdev->esco_type = (ESCO_HV1);
 	hdev->link_mode = (HCI_LM_ACCEPT);
 
 	hdev->idle_timeout = 0;
@@ -1254,7 +1255,7 @@
 static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
 {
 	struct hci_conn_hash *h = &hdev->conn_hash;
-	struct hci_conn  *conn = NULL;
+	struct hci_conn *conn = NULL;
 	int num = 0, min = ~0;
 	struct list_head *p;