wifi: ath12k: Identify DFS channel when sending scan channel list command

WMI_CHAN_INFO_DFS flag should be set when configuring a DFS channel
included in scan channel list. Without it, firmware will not send a
probe request frame which is needed in connection to an AP configured
with hidden SSID/network_id. So fix this to allow probe request frames
to be sent in cases where a beacon frame has been seen on the channel
first.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230316041144.7770-1-quic_bqiang@quicinc.com

drivers/net/wireless/ath/ath12k/wmi.c

@@ -2438,6 +2438,9 @@ int ath12k_wmi_send_scan_chan_list_cmd(struct ath12k *ar,
 			if (channel_arg->psc_channel)
 				chan_info->info |= cpu_to_le32(WMI_CHAN_INFO_PSC);
 
+			if (channel_arg->dfs_set)
+				chan_info->info |= cpu_to_le32(WMI_CHAN_INFO_DFS);
+
 			chan_info->info |= le32_encode_bits(channel_arg->phy_mode,
 							    WMI_CHAN_INFO_MODE);
 			*reg1 |= le32_encode_bits(channel_arg->minpower,