Bluetooth: Controller: Fix privacy advertiser connect peer address type

Fix an issue with enhanced connection complete event raised by the
advertiser role. The advertiser reported that it has resolved the
the identity address of the peer, even when the peer is connecting
using it's identity address.
The host will not have the correct on-air address type i.e public.

Signed-off-by: Joakim Andersson <joakim.andersson@nordicsemi.no>