iwlwifi: improve scan support

This modifies iwlwifi to
 * no longer build its own probe request, but use mac80211's
 * therefore, support arbitrary scan IEs (up to the max len)
 * support multiple scan SSIDs
 * support passive scanning

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-dev.h b/drivers/net/wireless/iwlwifi/iwl-dev.h
index 0922e33..e363d9b 100644
--- a/drivers/net/wireless/iwlwifi/iwl-dev.h
+++ b/drivers/net/wireless/iwlwifi/iwl-dev.h
@@ -889,9 +889,7 @@
 	unsigned long scan_start_tsf;
 	void *scan;
 	int scan_bands;
-	int one_direct_scan;
-	u8 direct_ssid_len;
-	u8 direct_ssid[IW_ESSID_MAX_SIZE];
+	struct cfg80211_scan_request *scan_request;
 	u8 scan_tx_ant[IEEE80211_NUM_BANDS];
 	u8 mgmt_tx_ant;