iwlwifi: mvm: restructure scan parameters calculation

Some scan parameters should be dependent on traffic conditions.
Centralize conditions verification in one function and obtain
scan max out-of-channel and suspend time in that new function.
Rely on bound interfaces indication instead of association state
to calculate scan parameters. If no bound interfaces use default
values for out-of-channel and suspend time parameters.

Additionally, get rid of NL80211_SCAN_FLAG_LOW_PRIORITY checks
since no use case for this exists so far.

Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
[reword commit log a bit]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>

drivers/net/wireless/iwlwifi/mvm/mac80211.c

@@ -375,8 +375,7 @@ int iwl_mvm_mac_setup_register(struct iwl_mvm *mvm)
 	}
 
 	hw->wiphy->features |= NL80211_FEATURE_P2P_GO_CTWIN |
-			       NL80211_FEATURE_P2P_GO_OPPPS |
-			       NL80211_FEATURE_LOW_PRIORITY_SCAN;
+			       NL80211_FEATURE_P2P_GO_OPPPS;
 
 	mvm->rts_threshold = IEEE80211_MAX_RTS_THRESHOLD;