Bluetooth: Add SCO fallback for unsupported feature error

The Bluetooth SIG PTS test case: TC_AG_ACS_BV_10_I, rejects eSCO with
"Unsupported Feature or Parameter Value" (0x11).  This patch adds case
for SCO fallback.

2007-09-20 12:20:37.787747 > HCI Event: Number of Completed Packets (0x13) plen 5
   handle 38 packets 1
2007-09-20 12:20:37.842154 < HCI Command: Setup Synchronous Connection (0x01|0x0028) plen 17
   handle 38 voice setting 0x0060
2007-09-20 12:20:37.847037 > HCI Event: Command Status (0x0f) plen 4
   Setup Synchronous Connection (0x01|0x0028) status 0x00 ncmd 1
2007-09-20 12:20:37.855233 > HCI Event: Max Slots Change (0x1b) plen 3
   handle 38 slots 1
2007-09-20 12:20:39.913354 > HCI Event: Synchronous Connect Complete (0x2c) plen 17
   status 0x11 handle 38 bdaddr 00:16:93:01:01:7A type eSCO
   Error: Unsupported Feature or Parameter Value
2007-09-20 12:20:39.922629 > HCI Event: Max Slots Change (0x1b) plen 3
   handle 38 slots 5
2007-09-20 12:20:58.126886 < ACL data: handle 38 flags 0x02 dlen 8
   L2CAP(d): cid 0x0041 len 4 [psm 0]
     0000: 0b 53 01 b8                                       .S..
2007-09-20 12:20:58.130138 > HCI Event: Number of Completed Packets (0x13) plen 5
   handle 38 packets 1
Signed-off-by: Stephen Coe <smcoe1@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/hci_event.c

@@ -1698,6 +1698,7 @@ static inline void hci_sync_conn_complete_evt(struct hci_dev *hdev, struct sk_bu
 		hci_conn_add_sysfs(conn);
 		break;
 
+	case 0x11:	/* Unsupported Feature or Parameter Value */
 	case 0x1c:	/* SCO interval rejected */
 	case 0x1a:	/* Unsupported Remote Feature */
 	case 0x1f:	/* Unspecified error */