Bluetooth: hci_core: add missing braces when using macro parameters

Macro parameters should always be put into braces when accessing it.

Fixes: 4fc9857a ("Bluetooth: hci_sync: Add check simultaneous roles support")
Signed-off-by: Christian Eggers <ceggers@arri.de>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>