qcacmn: Find proper second segment center frequency in HT160

During radar detection, with subchannel marking enabled, when the mode
is HT160, the secondary segment center frequency is determined by
adding +40 offset to the 160 band center frequency.

Consider the case where AP comes in channel 116 HT160. In this case,
the secondary segment center frequency is 5530 which is -40 to the
160 band center frequency (5570).
Primary segment center frequency is 5610 (+40 offset).

Due to this wrong offset addition, the channels added as part of
radar detection are in the wrong segment.

Find proper secondary segment center frequency used for radar
detection.

Change-Id: Icb527fad4fd1317acf8c2b9c010a8ac6a765f985
CRs-Fixed: 2475720

umac/dfs/core/src/misc/dfs_process_radar_found_ind.c

@@ -330,9 +330,7 @@ dfs_compute_radar_found_cfreq(struct wlan_dfs *dfs,
 			      uint32_t *freq_center)
 {
 	struct dfs_channel *curchan = dfs->dfs_curchan;
-	uint64_t flag;
 
-	flag = curchan->dfs_ch_flags;
 	if (radar_found->detector_id == AGILE_DETECTOR_ID) {
 		*freq_center = utils_dfs_chan_to_freq(
 				dfs->dfs_agile_precac_freq);
@@ -346,9 +344,21 @@ dfs_compute_radar_found_cfreq(struct wlan_dfs *dfs,
 		} else {
 			*freq_center = utils_dfs_chan_to_freq(
 					curchan->dfs_ch_vhtop_ch_freq_seg2);
-			if ((flag & WLAN_CHAN_VHT160) ||
-			    (flag & WLAN_CHAN_HE160))
-				*freq_center += DFS_160MHZ_SECOND_SEG_OFFSET;
+			if (WLAN_IS_CHAN_MODE_160(curchan)) {
+				/* If center frequency of entire 160 band
+				 * is less than center frequency of primary
+				 * segment, then the center frequency of
+				 * secondary segment is -40 of center
+				 * frequency of entire 160 segment.
+				 */
+				if (curchan->dfs_ch_vhtop_ch_freq_seg2 <
+				    curchan->dfs_ch_vhtop_ch_freq_seg1)
+					*freq_center -=
+						DFS_160MHZ_SECOND_SEG_OFFSET;
+				else
+					*freq_center +=
+						DFS_160MHZ_SECOND_SEG_OFFSET;
+			}
 		}
 	}
 }