o wl3501: introduce struct iw_mgmt_cf_pset

Just for completeness, it is included in the mgmt frames, but
not used in this driver, i.e. it may well be that this driver
supports contention free service, but the original driver had
no use for it at all.

drivers/net/wireless/wl3501.h

@@ -234,6 +234,14 @@ struct iw_mgmt_ds_pset {
 	u8 			    chan;
 } __attribute__ ((packed));
 
+struct iw_mgmt_cf_pset {
+	struct iw_mgmt_info_element el;
+	u8 			    cfp_count;
+	u8 			    cfp_period;
+	u16 			    cfp_max_duration;
+	u16 			    cfp_dur_remaining;
+} __attribute__ ((packed));
+
 struct iw_mgmt_ibss_pset {
 	struct iw_mgmt_info_element el;
 	u16 			    atim_window;
@@ -288,7 +296,7 @@ struct wl3501_start_req {
 	struct iw_mgmt_essid_pset   ssid;
 	u8			    bss_basic_rate_set[10];
 	u8			    operational_rate_set[10];
-	u8			    cf_pset[8];
+	struct iw_mgmt_cf_pset	    cf_pset;
 	struct iw_mgmt_ds_pset	    ds_pset;
 	struct iw_mgmt_ibss_pset    ibss_pset;
 };
@@ -367,7 +375,7 @@ struct wl3501_join_req {
 	u8			    bssid[ETH_ALEN];
 	struct iw_mgmt_essid_pset   ssid;
 	struct iw_mgmt_ds_pset	    ds_pset;
-	u8			    cf_pset[8];
+	struct iw_mgmt_cf_pset	    cf_pset;
 	struct iw_mgmt_ibss_pset    ibss_pset;
 	u8			    bss_basic_rate_set[10];
 };
@@ -421,7 +429,7 @@ struct wl3501_scan_confirm {
 	u8			    bssid[ETH_ALEN];
 	struct iw_mgmt_essid_pset   ssid;
 	struct iw_mgmt_ds_pset	    ds_pset;
-	u8			    cf_pset[8];
+	struct iw_mgmt_cf_pset	    cf_pset;
 	struct iw_mgmt_ibss_pset    ibss_pset;
 	u8			    bss_basic_rate_set[10];
 	u8			    rssi;