Periodically request pdev stats from FW to receive channel noise floor
information after monitor vdev has been brought up, based on the band
currently being sniffed. Use the band information as a secondary parameter
when sending periodic request to fw so a single noise floor value is sent
to host. Pass this noise floor information to dp_pdev to be populated in
radiotap header.
Change-Id: I488e4985392cb646ffdee914359fa995dbeb025e
CRs-Fixed: 2833458
6599516554