wifi: cfg80211: make sure NAN chandefs are valid

wifi: cfg80211: make sure NAN chandefs are valid

Until now there was not handling for NAN in reg_wdev_chan_valid.
Now as this wdev might use chandefs, check the validity of those.

Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20260108102921.51b42ffc9a42.Iacb030fc17027afb55707ca1d6dc146631d55767@changeid
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://patch.msgid.link/20260219094725.3846371-4-miriam.rachel.korenblit@intel.com
Link: https://patch.msgid.link/20260318123926.206536-3-miriam.rachel.korenblit@intel.com
Signed-off-by: Johannes Berg <johannes.berg@intel.com>