wifi: mac80211: remove label usage in ieee80211_start_radar_detection()

After locks rework [1], ieee80211_start_radar_detection() function is no
longer acquiring any lock as such explicitly. Hence, it is not unlocking
anything as well. However, label "out_unlock" is still used which creates
confusion. Also, now there is no need of goto label as such.

Get rid of the goto logic and use direct return statements.

[1]: https://lore.kernel.org/all/20230828135928.b1c6efffe9ad.I4aec875e25abc9ef0b5ad1e70b5747fd483fbd3c@changeid/

Signed-off-by: Aditya Kumar Singh <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Johannes Berg <[e-mail]>

net/mac80211/cfg.c

···
 
 	lockdep_assert_wiphy(local->hw.wiphy);
 
-	if (!list_empty(&local->roc_list) || local->scanning) {
-		err = -EBUSY;
-		goto out_unlock;
-	}
+	if (!list_empty(&local->roc_list) || local->scanning)
+		return -EBUSY;
 
 	/* whatever, but channel contexts should not complain about that one */
 	sdata->deflink.smps_mode = IEEE80211_SMPS_OFF;
···
 	err = ieee80211_link_use_channel(&sdata->deflink, &chanreq,
 					 IEEE80211_CHANCTX_SHARED);
 	if (err)
-		goto out_unlock;
+		return err;
 
 	wiphy_delayed_work_queue(wiphy, &sdata->deflink.dfs_cac_timer_work,
 				 msecs_to_jiffies(cac_time_ms));
 
- out_unlock:
-	return err;
+	return 0;
 }
 
 static void ieee80211_end_cac(struct wiphy *wiphy,