ath: fix incorrect PPB on FCC radar type 5

The minimum number of pulses per burst on FCC radar type 5 is 1.
Use this number for correct radar detection.
Signed-off-by: NPeter Oh <poh@qca.qualcomm.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ath/dfs_pattern_detector.c

@@ -86,7 +86,7 @@ static const struct radar_detector_specs fcc_radar_ref_types[] = {
 	FCC_PATTERN(1, 0, 5, 150, 230, 1, 23),
 	FCC_PATTERN(2, 6, 10, 200, 500, 1, 16),
 	FCC_PATTERN(3, 11, 20, 200, 500, 1, 12),
-	FCC_PATTERN(4, 50, 100, 1000, 2000, 1, 20),
+	FCC_PATTERN(4, 50, 100, 1000, 2000, 1, 1),
 	FCC_PATTERN(5, 0, 1, 333, 333, 1, 9),
 };