ath10k: else is not generally useful after a break or return

Fixes checkpatch warnings:

WARNING: else is not generally useful after a break or return

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

drivers/net/wireless/ath/ath10k/debug.c

@@ -1180,8 +1180,8 @@ int ath10k_debug_register(struct ath10k *ar)
 	if (IS_ERR_OR_NULL(ar->debug.debugfs_phy)) {
 		if (IS_ERR(ar->debug.debugfs_phy))
 			return PTR_ERR(ar->debug.debugfs_phy);
-		else
-			return -ENOMEM;
+
+		return -ENOMEM;
 	}
 
 	INIT_DELAYED_WORK(&ar->debug.htt_stats_dwork,