wifi: cfg80211: remove chandef check in cfg80211_cac_event()

commit d6f671c8 upstream.

The current check only worked for AP mode, but we can do
radar detection in mesh as well (for example). We could
try to check this using wdev_chandef(), but we also don't
really care since the chandef is passed in and we have no
need to use it anymore (since we added the argument in
commit d2859df5 ("cfg80211/mac80211: DFS setup chandef
for cac event")).

Change-Id: I856e4344d5e64ff4d2eead0b4c53b11f264be9b8
Fixes: 7b0a0e3c ("wifi: cfg80211: do some rework towards MLO link APIs")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>