ath11k: dp: clean up a variable name

The "&ar->ab->base_lock" and "&ab->base_lock" locks are the same lock
but it's nicer to use the same name consistently everywhere.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/X9s7QAHDM2OTIo3a@mwanda

drivers/net/wireless/ath/ath11k/dp_rx.c

@@ -1163,7 +1163,7 @@ int ath11k_dp_peer_rx_pn_replay_config(struct ath11k_vif *arvif,
 		}
 	}
 
-	spin_unlock_bh(&ar->ab->base_lock);
+	spin_unlock_bh(&ab->base_lock);
 
 	return ret;
 }