wifi: mwifiex: cleanup adapter data

Remove unused and set but unused 'dfs_workqueue', 'dfs_work', and
'scan_channels' members of 'struct mwifiex_adapter', adjust users.
Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Acked-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230814142101.60308-1-dmantipov@yandex.ru

drivers/net/wireless/marvell/mwifiex/init.c

@@ -288,7 +288,6 @@ static void mwifiex_init_adapter(struct mwifiex_adapter *adapter)
 	adapter->fw_bands = 0;
 	adapter->config_bands = 0;
 	adapter->adhoc_start_band = 0;
-	adapter->scan_channels = NULL;
 	adapter->fw_release_number = 0;
 	adapter->fw_cap_info = 0;
 	memset(&adapter->upld_buf, 0, sizeof(adapter->upld_buf));

drivers/net/wireless/marvell/mwifiex/main.h

@@ -878,8 +878,6 @@ struct mwifiex_adapter {
 	struct work_struct main_work;
 	struct workqueue_struct *rx_workqueue;
 	struct work_struct rx_work;
-	struct workqueue_struct *dfs_workqueue;
-	struct work_struct dfs_work;
 	bool rx_work_enabled;
 	bool rx_processing;
 	bool delay_main_work;
@@ -943,7 +941,6 @@ struct mwifiex_adapter {
 	u8 fw_bands;
 	u8 adhoc_start_band;
 	u8 config_bands;
-	struct mwifiex_chan_scan_param_set *scan_channels;
 	u8 tx_lock_flag;
 	struct mwifiex_sleep_period sleep_period;
 	u16 ps_mode;

drivers/net/wireless/marvell/mwifiex/scan.c

@@ -612,7 +612,6 @@ mwifiex_scan_channel_list(struct mwifiex_private *priv,
 	struct mwifiex_adapter *adapter = priv->adapter;
 	int ret = 0;
 	struct mwifiex_chan_scan_param_set *tmp_chan_list;
-	struct mwifiex_chan_scan_param_set *start_chan;
 	u32 tlv_idx, rates_size, cmd_no;
 	u32 total_scan_time;
 	u32 done_early;
@@ -643,7 +642,6 @@ mwifiex_scan_channel_list(struct mwifiex_private *priv,
 		total_scan_time = 0;
 		radio_type = 0;
 		chan_tlv_out->header.len = 0;
-		start_chan = tmp_chan_list;
 		done_early = false;
 
 		/*
@@ -750,8 +748,6 @@ mwifiex_scan_channel_list(struct mwifiex_private *priv,
 		rates_size = mwifiex_append_rate_tlv(priv, scan_cfg_out,
 						     radio_type);
 
-		priv->adapter->scan_channels = start_chan;
-
 		/* Send the scan command to the firmware with the specified
 		   cfg */
 		if (priv->adapter->ext_scan)