qcacmn: Enable STA DFS in F/W

If STA DFS is enabled before vdev creation through etc/config/wireless
then VDEV START is sent to F/W as a part of the normal flow to bring
the VAP up. However, if STA DFS is enabled/disabled on the fly for a
running VAP then do a VDEV STOP, followed by a VDEV START of the STA
VAP and set/unset WMI_CHAN_FLAG_STA_DFS flag in VDEV start.

Change-Id: I032ffa53d89eaafcb43c648670af3b3f2134561f
CRs-Fixed: 2843248

wmi/src/wmi_unified_tlv.c

@@ -1001,6 +1001,9 @@ static inline void copy_channel_info(
 	if (req->channel.dfs_set_cfreq2)
 		WMI_SET_CHANNEL_FLAG(chan, WMI_CHAN_FLAG_DFS_CFREQ2);
 
+	if (req->channel.is_stadfs_en)
+		WMI_SET_CHANNEL_FLAG(chan, WMI_CHAN_FLAG_STA_DFS);
+
 	/* According to firmware both reg power and max tx power
 	 * on set channel power is used and set it to max reg
 	 * power from regulatory.