ath9k: DFS radar use correct width enum

Use correct width enums when setup
radar_detect_widths for DFS.

Signed-off-by: Janusz Dziedzic <[e-mail]>
Signed-off-by: John W. Linville <[e-mail]>

drivers/net/wireless/ath/ath9k/init.c

···
 		.max_interfaces = 1,
 		.num_different_channels = 1,
 		.beacon_int_infra_match = true,
-		.radar_detect_widths =	BIT(NL80211_CHAN_NO_HT) |
-					BIT(NL80211_CHAN_HT20),
+		.radar_detect_widths =	BIT(NL80211_CHAN_WIDTH_20_NOHT) |
+					BIT(NL80211_CHAN_WIDTH_20),
 	}
 };