Bluetooth: Move all mgmt command quirks to handler table

In order to completely generalize the mgmt command handling we need to
move away command-specific information from mgmt_control() into the
actual command table. This patch adds a new 'flags' field to the handler
entries which can now contain the following command specific
information:

 - Command takes variable length parameters
 - Command doesn't target any specific HCI device
 - Command can be sent when the HCI device is unconfigured

After this the mgmt_control() function is completely generic and can
potentially be reused by new HCI channels.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/net/bluetooth/hci_core.h

@@ -1273,11 +1273,15 @@ void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb);
 
 void hci_sock_dev_event(struct hci_dev *hdev, int event);
 
+#define HCI_MGMT_VAR_LEN	(1 << 0)
+#define HCI_MGMT_NO_HDEV	(1 << 1)
+#define HCI_MGMT_UNCONFIGURED	(1 << 2)
+
 struct hci_mgmt_handler {
 	int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
 		     u16 data_len);
-	bool var_len;
 	size_t data_len;
+	unsigned long flags;
 };
 
 struct hci_mgmt_chan {