Bluetooth: hci_sync: Enable synch'd set_bredr

Uses previously written:
  hci_write_fast_connectable_sync
  hci_update_scan_sync
  hci_update_adv_data_sync

Signed-off-by: Brian Gix <brian.gix@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>