Bluetooth: Introduce hci_dev_set_flag helper macro

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

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

diff --cc include/net/bluetooth/hci_core.h
Simple merge

diff --cc net/bluetooth/hci_conn.c
Simple merge

diff --cc net/bluetooth/hci_core.c
Simple merge

diff --cc net/bluetooth/hci_event.c
Simple merge

diff --cc net/bluetooth/hci_request.c
Simple merge

diff --cc net/bluetooth/mgmt.c
Simple merge