Bluetooth: Fix using NRPA for connectable advertising

If privacy is disabled and static random address is used for identity
we need to restore static address before enabling advertising.
Otherwise NRPA used for any previous active scan could be used instead.

Change-Id: Ifea0d2863d78060c84e61d89ef384a94e86895b6
Signed-off-by: Szymon Janc <ext.szymon.janc@tieto.com>