wifi: ipw2x00: fix array of flexible structures warnings

There are a number of these here, fix them by using
appropriate casts. No binary changes.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20220904212910.645346411660.I471e8fadce54ea262920828f25b8e84545bcd07e@changeid

drivers/net/wireless/intel/ipw2x00/libipw.h

@@ -405,7 +405,7 @@ struct libipw_auth {
 	__le16 transaction;
 	__le16 status;
 	/* challenge */
-	struct libipw_info_element info_element[];
+	u8 variable[];
 } __packed;
 
 struct libipw_channel_switch {
@@ -423,7 +423,6 @@ struct libipw_action {
 	union {
 		struct libipw_action_exchange {
 			u8 token;
-			struct libipw_info_element info_element[0];
 		} exchange;
 		struct libipw_channel_switch channel_switch;
 
@@ -441,7 +440,7 @@ struct libipw_disassoc {
 struct libipw_probe_request {
 	struct libipw_hdr_3addr header;
 	/* SSID, supported rates */
-	struct libipw_info_element info_element[];
+	u8 variable[];
 } __packed;
 
 struct libipw_probe_response {
@@ -451,7 +450,7 @@ struct libipw_probe_response {
 	__le16 capability;
 	/* SSID, supported rates, FH params, DS params,
 	 * CF params, IBSS params, TIM (if beacon), RSN */
-	struct libipw_info_element info_element[];
+	u8 variable[];
 } __packed;
 
 /* Alias beacon for probe_response */
@@ -462,7 +461,7 @@ struct libipw_assoc_request {
 	__le16 capability;
 	__le16 listen_interval;
 	/* SSID, supported rates, RSN */
-	struct libipw_info_element info_element[];
+	u8 variable[];
 } __packed;
 
 struct libipw_reassoc_request {
@@ -470,7 +469,7 @@ struct libipw_reassoc_request {
 	__le16 capability;
 	__le16 listen_interval;
 	u8 current_ap[ETH_ALEN];
-	struct libipw_info_element info_element[];
+	u8 variable[];
 } __packed;
 
 struct libipw_assoc_response {
@@ -479,7 +478,7 @@ struct libipw_assoc_response {
 	__le16 status;
 	__le16 aid;
 	/* supported rates */
-	struct libipw_info_element info_element[];
+	u8 variable[];
 } __packed;
 
 struct libipw_txb {

drivers/net/wireless/intel/ipw2x00/libipw_rx.c

@@ -1329,8 +1329,8 @@ static int libipw_handle_assoc_resp(struct libipw_device *ieee, struct libipw_as
 	network->wpa_ie_len = 0;
 	network->rsn_ie_len = 0;
 
-	if (libipw_parse_info_param
-	    (frame->info_element, stats->len - sizeof(*frame), network))
+	if (libipw_parse_info_param((void *)frame->variable,
+				    stats->len - sizeof(*frame), network))
 		return 1;
 
 	network->mode = 0;
@@ -1389,8 +1389,8 @@ static int libipw_network_init(struct libipw_device *ieee, struct libipw_probe_r
 	network->wpa_ie_len = 0;
 	network->rsn_ie_len = 0;
 
-	if (libipw_parse_info_param
-	    (beacon->info_element, stats->len - sizeof(*beacon), network))
+	if (libipw_parse_info_param((void *)beacon->variable,
+				    stats->len - sizeof(*beacon), network))
 		return 1;
 
 	network->mode = 0;
@@ -1510,7 +1510,7 @@ static void libipw_process_probe_response(struct libipw_device
 	struct libipw_network *target;
 	struct libipw_network *oldest = NULL;
 #ifdef CONFIG_LIBIPW_DEBUG
-	struct libipw_info_element *info_element = beacon->info_element;
+	struct libipw_info_element *info_element = (void *)beacon->variable;
 #endif
 	unsigned long flags;