Bluetooth: hci_core: Fix using {cis,bis}_capable for current settings

{cis,bis}_capable only indicates the controller supports the feature
since it doesn't check that LE is enabled so it shall not be used for
current setting, instead this introduces {cis,bis}_enabled macros that
can be used to indicate that these features are currently enabled.

Fixes: 26afbd82 ("Bluetooth: Add initial implementation of CIS connections")
Fixes: eca0ae4a ("Bluetooth: Add initial implementation of BIS connections")
Fixes: ae753361 ("Bluetooth: Check for ISO support in controller")
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>