Proper management of controller ACL buffers.

Reclaim all the unacknowledged controller ACL buffers associated
with a L2CAP link when L2CAP control block is released.
Bug:8589069

Change-Id: Icef1646041e73280a13dedc7a45564d032c59712
diff --git a/stack/l2cap/l2c_link.c b/stack/l2cap/l2c_link.c
index 4bb2be7..1974bb2 100644
--- a/stack/l2cap/l2c_link.c
+++ b/stack/l2cap/l2c_link.c
@@ -1394,19 +1394,19 @@
             (*p_lcb->p_nocp_cb)(p_lcb->remote_bd_addr);
         }
 
-#if (BLE_INCLUDED == TRUE)
-        if (p_lcb && p_lcb->is_ble_link)
-            l2cb.controller_le_xmit_window += num_sent;
-        else
-#endif
-        {
-
-            /* Maintain the total window to the controller */
-            l2cb.controller_xmit_window += num_sent;
-        }
-
         if (p_lcb)
         {
+#if (BLE_INCLUDED == TRUE)
+            if (p_lcb->is_ble_link)
+            {
+                l2cb.controller_le_xmit_window += num_sent;
+            }
+            else
+#endif
+            {
+                /* Maintain the total window to the controller */
+                l2cb.controller_xmit_window += num_sent;
+            }
             /* If doing round-robin, adjust communal counts */
             if (p_lcb->link_xmit_quota == 0)
             {