cfg80211: Add missing tracing to cfg80211

Add missing tracing for:

1. start_radar_detection()
2. set_mcast_rates()
3. set_coalesce()

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>