Bluetooth: Controller: Fix per adv chain broken after per adv re-enable

If there is enabled support for ADI in periodic advertising and
periodic advertising uses chained PDUs there is an assert when
periodic advertising is re-enabled.

There is missing a code that will set a chain for PDU with
updated ADI field.

The commit fixes the issue.

Signed-off-by: Piotr Pryga <piotr.pryga@nordicsemi.no>