The BT test ctrl_sw_privacy_unit was enabling mocking but never using
it. Clean it up and remove the Kconfig.
Signed-off-by: Yuval Peress <peress@google.com>
The net_buf subsystem is now fully compatible with the new timeout
API, so move the selection of the legacy API to those specific
subsystems that use net_buf and still need converting.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>