wil6210: allow scan on AP interface

Scan is allowed only on client interfaces (STA/P2P).
Allow scan on AP interface so that the AP can discover rouge
or unauthorized neighbor APs.

Signed-off-by: Ahmad Masri <amasri@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>