Use special scan result processing steps only on requesting interface

Use special scan result processing steps only on requesting interface

Scan result events are shared between all virtual interfaces sharing the
same radio. However, some of the steps are not really appropriate on
virtual interfaces that did not issue the scan request. Fix this by
making these steps conditional on the scan results being processed on
the interface that requested them.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>