iwlwifi: remove scan_bands logic

Since mac80211 will now never request scanning
multiple bands, we can remove all the associated
logic and scan a single band only in each scan.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index b2d94c7..ee4cb02 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -1054,7 +1054,7 @@
 	unsigned long scan_pass_start;
 	unsigned long scan_start_tsf;
 	void *scan;
-	int scan_bands;
+	enum ieee80211_band scan_band;
 	struct cfg80211_scan_request *scan_request;
 	bool is_internal_short_scan;
 	u8 scan_tx_ant[IEEE80211_NUM_BANDS];