Bluetooth: Introduce hci_dev_clear_flag helper macro

Instead of manually coding clear_bit on hdev->dev_flags all the time,
use hci_dev_clear_flag helper macro.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index c0fd42c..ee5e598 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -700,7 +700,7 @@
 	 * and write a new random address. The flag will be set back on
 	 * as soon as the SET_ADV_ENABLE HCI command completes.
 	 */
-	clear_bit(HCI_LE_ADV, &hdev->dev_flags);
+	hci_dev_clear_flag(hdev, HCI_LE_ADV);
 
 	/* Set require_privacy to false so that the remote device has a
 	 * chance of identifying us.