Bluetooth: Fix updating advertising state flags and data

This patch adds a callback for the HCI_LE_Set_Advertise_Enable command.
The callback is responsible for updating the HCI_LE_PERIPHERAL flag
updating as well as updating the advertising data flags field to
indicate undirected connectable advertising.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

include/net/bluetooth/hci.h

@@ -957,6 +957,8 @@ struct hci_cp_le_set_adv_data {
 	__u8	data[HCI_MAX_AD_LENGTH];
 } __packed;
 
+#define HCI_OP_LE_SET_ADV_ENABLE	0x200a
+
 #define HCI_OP_LE_SET_SCAN_PARAM	0x200b
 struct hci_cp_le_set_scan_param {
 	__u8    type;